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The crisp scent of salty air flooded through the Captain’s headquarters, flowing in through the open portholes. The Perseus was ready to go on another voyage. This time it would be a farther trip for the crew, as they were heading to America for Corn City. The inside of the ship was cramped with high tension of the two leaders of the Kingdom of Science. The crew was chilling around until they heard a dispute was commencing, it was always entertaining seeing the science leader and captain of the ship get into an argument as they put their relationship on pause and put humanity first. Kohaku sat on the table behind them to get a good view, with Chrome standing beside her—eyes going back and forth. Gen was bringing people into the headquarters so they wouldn’t miss the heated discussion. Everyone stood around in the background, completely silent as they watched the storm-brewing, though they didn't know what this discussion was even about.
On the table in the middle of them was the map of the world with pins on top of it, it had lines and circles all over it. “Forty days, Ryu,” Senku stated, his voice lingering a dry rasp. He tapped his ink-stained finger directly onto an aggressively drawn line cutting straight through the Pacific coast, then pointed down to where it says 40 days.
“Ten billion percent chance we will make it in time during corn season, we will be just in time for harvest. It’s basic mathematical flawless efficiency.”
“Ha! Ha! Such a beautiful and reckless gamble, my dearest treasure!” Ryusui laughed, a loud booming sound that bounced off the wooden beams of the captain’s room. He leaned over the table, his fist slamming onto it, his physical presence completely occupying Senku’s space, and stood up straight—using his height as an intimidation advantage. Knowing Senku, he didn’t move not one millimeter, ‘advantages’ like that never moved him. He snapped his fingers sharply, his eyes flashing with an electric, competitive fire. He loved getting in heated discussions with his boyfriend. It made him feel good.
“Sixty days! As the captain, I demand a route that guarantees the safety of my crew and my ship. A true greedy king would want what’s best for his crew, and I don’t want to overwhelm the crew by making the voyage shorter!”
To the surrounding crowd, the discussion was known that it was about the voyage, some men on the battle team were a bit disappointed. They expected a relationship argument to sway Ryusui. It was a catastrophic clash of unstoppable egos, the air between them was thick with an entirely different kind of heat. They had been openingly dating for months, though it has been kept mostly in private since Senku wasn’t much for PDA, but for this argument he wants to just shut Ryusui up with a kiss, it was their version of foreplay. Senku’s confident, arrogant smirk challenged a sharp grin from Ryusui. As they leaned forward they were inches apart, faces close enough to feel the heat of each other’s breath entirely exhilarated by the other’s stubbornness, the tension between them was getting intense, some people secretly wanting them to kiss in front of them.
“Ryu, do you not understand we need to get there before the crops die in the winter? You really have to fuel that ego of yours?” Senku provoked, and narrowed his eyes playfully.
“And the sea doesn’t care about the season, my treasure, we need to keep the crew’s well being our top priority.” Ryusui shot back, his voice dropping an octave, a low purr that sent a sudden jolt straight to Senku’s stomach—causing Senku to look away biting his lips.
“Well I agree with Senku, we would just be wasting our time making this voyage and miss the corn.” Kohaku bravely speaks up as she crosses her legs looking at Ryusui.
“My, my, I agree with Ryusui. We need to take care of the crew and put ourselves first before anything.” Gen makes eye contact with Senku.
“Since we can’t agree to this arrangement, there is only one civilized way to settle a dispute of desire! We play!” Ryusui snapped his fingers facing the crowd, his eyes landing at François.
—ᯓଳ
Ukyo stood on the other side of the poker table shuffling the cards. Ryusui demanded for this moment to feel like the real thing, Ukyo was dressed as a dealer at a casino, with everyone standing in the back as an audience of this intensive poker game. He had also insisted the players dress for the stakes. Senku stood by the edge of the table, tugging uncomfortably at the collar of his tailored, burgundy suit. It was a marvel of modern weaving, hugging his lean frame perfectly, though he loudly complained about it. He really had to go all out, that dumbass.’ Then Ryusui walked in, and Senku’s internal monologue completely short-circuited.
Ryusui wore a dazzling turquoise colored tuxedo with a yellow vest and a clean white shirt, and an orange bowtie to not stir away from his signature orange in his outfit. He looked entirely in his element, a powerful monarch commanding a room. Just as he was back in the old world with the Nanami Conglomerate. His eyes swept across the cabin, immediately locking onto Senku. A charming appreciation flared in Ryusui's gaze. He drank in the sight of his boyfriend in red formalwear, his smirk widening. He isn’t used to seeing Senku wearing something that wasn’t his usual clothing, he in fact loved seeing him out of his comfort zone. What really endeared him was the matching yellow vests, courtesy of Yuzuriha. For even at an argument, they were tied together by the yellow vest.
Kohaku walked towards Senku’s side with a gorgeous yellow dress, red thigh high socks, and yellow heels to match Senku perfectly as the duo they are. Gen on the other hand wore his signature color purple—a purple tux with a white shirt underneath, his chest exposed and ready to do mischief on the poker table. He walked towards Ryusui’s side.
"Are you ready to lose, my treasure?" Ryusui murmured, pulling out a heavy wooden chair. "Let’s see if your cards match your tongue."
The poker game was a brutal, psychological war. Card counting versus raw, human intuition. Senku played with cold, calculated precision, keeping his face entirely unreadable as he memorized the mathematical probabilities of every deck rotation. He had Kohaku on his side, her amazing eyesight catching everything Gen tried to do, the mentalist was a sneaky rabbit—he would do anything to help Ryusui win. Ryusui, however, didn't look at the cards, he looked at Senku. He tracked the slight twitch of Senku’s fingers, the micro-dilation of his pupils, the rhythm of his breathing. With Gen being on his side, he didn’t worry much. After 3 attempts of cheating, during the final attempt, he was able to set down 4 of aces. The chips piled high in the center. The final hand was a suffocating silence. Ryusui laid down a brilliant 4 of aces, snapping his fingers with a triumphant laugh. "A beautiful hand for a beautiful route. Sixty days it is!"
Senku calculated and muttered—”top, 2 to the bottom, 6th card, and 10th card”—to Kohaku, she quickly grabbed the cards from that order. It was too fast for anyone to debate if it was from the top or different angles.
"Heh. Not so fast, big shot," Senku muttered. With a flick of his wrist, he turned over his cards. A straight royal flush. The mathematical anomaly.
"Ten billion percent accuracy beats your gut instinct tonight. We will take forty days to reach America!” Ryusui blinked, looked at the cards, and then burst into a genuine, delighted roar of laughter. He wasn't even mad about losing. He was simply completely captivated by the ruthless, dazzling brilliance of the man across from him.
—ᯓଳ
After the intense game Yo wanted to do more gambling, and it gave Ryusui an idea to make a casino out of the deck. To continue the vibe of gambling, and to make it up to the crew for the twenty days Senku had ruthlessly chopped off the travel schedule, Ryusui officially declared it Casino Night for the entire village. The celebration moved out under a vast, star-lit sky. François had constructed a flawless wooden bar, moving with elegant efficiency. For the crew members who chose to stay sober and alert—like Kohaku, Ukyo, Gen, and Tsukasa—François served beautifully crafted, vibrant non-alcoholic cocktails made from ingredients that suited their personalities. For the rest, the main attraction was a massive wooden keg of Senku's perfectly fermented, ice-cold scientific beer. The real friction was happening right at the edge of the bar.
Senku and Ryusui were both holding foaming glasses of beer, and the high-adrenaline energy from the poker game hadn't dissipated at all. If anything, the alcohol was only making their petty war much worse. They were actively trying to provoke each other, trading sharp, competitive digs just to see who would crack first.
"You got lucky with that deck rotation, my dearest," Ryusui taunted, taking a long drink of his beer. He leaned his hip against the counter, his eyes dark and deliberate as they swept down the front of Senku's tailored red suit. Despite his arrogance, a low, genuine rasp crept into his voice. "Though I suppose I can't be too furious. You look utterly hot in that outfit tonight." Senku didn't blush.
Instead, a cocky, incredibly petty smirk crossed his face. He rolled his eyes playfully, entirely unbothered, and took a slow sip of his own drink.
"Heh. Tell me something I don't know, Captain. Ten billion percent of the data already states I look good in everything."
“Hey guys! Can I take a photo of you both?” Minami smiled holding up her camera not wanting to miss the chance to take a photo of the kingdom of science power couple. Ryusui held Senku by his waist pulling him close to him hugging him tightly, they smiled looking at each other.
“Wow how cute, you guys are such a cute couple!” Minami flushed at the photo she held onto it so she could produce it and give it to Senku later.
With a soft chuckle, Senku turned his back on his boyfriend and walked casually over to the other side of the bar to refill his glass. Ryusui stayed frozen for a second, his eyes narrowing as he shamelessly checked Senku out from behind, watching the tight fabric of the suit jacket move over his shoulders and his pants being tight on the right parts.
“Hm,” Ryusui thought, his smirk turning dangerous. Two can play at this game.
He was so determined to get a reaction out of his stubborn, cocky boyfriend, Ryusui immediately launched himself back into the crowd and stood by the gambling table. He took his loud and obnoxious charm and dialed it up to an absolute eleven. He sauntered over to the blackjack table, loudly snapping his fingers and laughing as he tossed a heavy, casual arm right around Gen's shoulders, leaning in close to whisper a sly piece of betting strategy. Gen smirked and, him being the sober one and the mentalist, he knew to play into the plan.
When Nikki walked past, Ryusui spun around, smoothly taking her hand to bow and loudly compliment her fierce, striking presence in her casino wear. A few minutes later, he was standing right next to Minami's camera setup, flashing his most dazzling, blindingly greedy smile directly at her, turning his magnetic affection on full blast for anyone and everyone who caught his eye.
Across the deck, standing by the keg, Senku watched, his cocky smirk was completely gone from his face. His fingers gripped his glass so tightly the wood creaked under the pressure. He tried to run card-counting metrics in his head to distract himself, but his brain kept zeroing out, replaced by a toxic anger. He hated the way Ryusui’s touch was suddenly distributed so freely. He hated that anyone else got to experience that charm just because he had walked away. How could he show his dashing smile to anyone that’s not him, he was infuriated by the fact he had the audacity to do it in front of him, or in general. He was furiously jealous, and the feeling was defying his logic.
When Ryusui finally broke away from the roaring crowd and spotted Senku standing by the dark back railing of the ship, he walked over, entirely satisfied with the dark, dangerous look in the scientist's eyes.
"Come now, my treasure. You won the route," Ryusui murmured, sliding a warm, confident hand around Senku’s waist. He leaned down, his breath brushing Senku’s cheek.
"Surely a brilliant mind, like yourself, can spare a few cognitive cells to drink with his boyfriend? But anyways you look absolutely breathtaking tonight, my treasure—" He didn't get to finish.
Senku didn't scoff. He didn't make a sarcastic remark. Instead, his hand shot out, wrapping tightly into the silk of Ryusui’s dress shirt. A sudden aggressive jerk, Senku yanked and dragged the larger man straight into the black, suffocating shadows of the wooden staircase leading down into the empty cargo hold.
—ᯓଳ
Before Ryusui could even process the sudden shift in gravity, Senku shoved him hard against the heavy wooden paneling of the lower deck, pinning him there. The lower deck was completely dark, smelling of cedar, and sea salt. The muffled and rhythmic thumping of the casino above felt a million miles away. Ryusui was momentarily breathless, his eyes wide in the dim silver light filtering through a small grate, but a deeply intrigued, wicked smirk quickly spread across his face.
"My, my, Senku," Ryusui purrs, his voice dropping into a low, teasing register.
"Such sudden, magnificent urgency from my logical scientist. Are you perhaps... envious of the attention I was paying our friends up there?" He says knowing how to push his boyfriend’s buttons, especially when he’s jealous. It's a pleasure to see that his boyfriend cares to the point of jealousy.
Senku didn't smile. He leaned in so close their noses almost brushed, his eyes pitch-black and heavily hooded. His hand moved up, fingers gripping Ryusui's jawline with a tight, possessive hold that made the captain's breath catch.
"Heh. Ten billion percent jealous," Senku confessed flatly, dropping every single line of defense he owned. His voice was a gravely, demanding rasp against Ryusui's ear. He leaned down and bit hard into the sensitive skin of Ryusui's jawline, eliciting a sharp gasp from the sailor.
"You've been flashing that greedy smile at everyone else all night, Captain. You forgot who actually owns your desire. You're going to have to make it up to me. Right now."
Ryusui’s brain is completely short-circuited. He was a man who thrived on being wanted, but seeing his usually detached, rational boyfriend completely feral with possessiveness was the most intoxicating thing he had ever experienced. He let out a low groan, Ryusui eagerly surrendered all control, letting the scientist rule him. Very rarely did Senku get jealous because of how obnoxious his boyfriend was. Although flirtatious, he knew perfectly well where home was and didn’t bother making it that big of a deal. The main problem was that he was tipsy enough to let this kind of behavior slide. Ryusui couldn’t miss a chance of Senku being tipsy and jealous. He was going to savor every moment of this.
The formal wear they had looked so pristine in became a frustrating obstacle. They took off their jackets and threw them on the ground. Senku was slowly getting impatient, so he aggressively ripped off Ryusui’s bowtie, his fingers working with a desperate hunger as he tore open the buttons of Ryusui's white shirt. Ryusui’s hands were shaking as he gripped Senku’s vest and shirt, peeling it down his shoulders, their mouths locking together in a heavy, bruised make-out session that tasted of bitter beer, sea salt, and raw hunger.
Senku treated Ryusui’s body like the ultimate puzzle he was determined to solve and shatter. He pushed Ryusui’s head back against the timber, mapping his mouth down his throat. He deliberately bit down on the junction of Ryusui’s neck and shoulder, sucking heavily until a dark, undeniable mark formed. He wanted it right there, above the collar line, so that tomorrow morning, Minami, Nikki, Gen, and the entire crew would see it and know exactly who the captain belonged to. Even if they knew they just played into his ragebait attempt.
Senku forced Ryusui back against a stack of soft fabric cargo crates, straddling his lap completely. He used his hands and mouth with a ruthless, optimized precision, hitting every single micro-reaction, forcing the confident king of the seas to arch his back, grip the crates until his knuckles whitened, and beg for touch. Senku looked down at him through the dark, smirking with a dominant, insatiable energy that completely matched Ryusui's high stamina, driving them both over the edge.
“Go ahead, make it up to me...” Senku whispered into Ryusui’s ear, nibbling on it. Ryusui’s eyes sparked with a joyful expression, and his head getting foggy at the thought of doing wonders on Senku.
“Ok baby, lay down here.” Senku laid down on the crates, Ryusui looked over at him and undressed him fully. He went down and licked his inner thighs, his hands touching them with a tender touch, his chest heaving as he licked deeper in. He grabbed Senku’s cock and licked away the precum, savoring the bitter taste of his excitement by the teasing touch. Ryusui enveloped Senku’s cock with his mouth, taking it all the way in. He closed his eyes with a slight gag, close to swallowing it, but continued bopping his head enjoying the pleasure and the feeling of drool going down from his mouth.
“Ha…Shit…You’re doing so well.” Senku says as he throws his head back, his hand reaching to Ryusui’s hair, feeling his head moving up and down and hearing the wet sounds. It turned him on, causing his stomach to knot.
“I’m going to—” Senku whined, sitting uncomfortably, moving around. He felt a nod from Ryusui allowing him to cum in his mouth. He eventually came and Ryusui pulled away, keeping eye contact with Senku, swallowing him whole, licking his lips savoring the taste.
“So yummy my love, I could do this forever if I could.” Ryusui smirked, going down, kissing Senku’s stomach, chest, and neck. He sucked on his neck, leaving red and purple marks, wanting to show off to the crew who he belongs to and what they were doing while they slipped away.
”Spit on my hand…” Ryusui tells Senku after he had spat on his hand. Senku was flushed, uncaring, and spat on it. He rubbed it all over his cock and aligned himself with Senku’s hole, he slid in and slowly began thrusting. Other than managing the ship in his control, he loved fucking Senku. He could do this all day everyday. He slowly thrusted into him and upped the pace, feeling Senku clench, making Ryusui throw his hand back and grinded into him faster.
”Faster Ryu…My captain…Mfgphh,” Senku asked but the level of the crates didn’t allow it to happen. Ryusui leaned down and picked Senku up and made him lean onto the wall of the ship. Ryusui thrusted upward at a faster pace., Senku scratched Ryusui’s back with pleasure, moaning into his ear, turning Ryusui on even more. It is music to his ears knowing he is pleasuring his boyfriend, and that no one else can dare to try. Ryusui’s grunts got louder, and sank his teeth into Senku’s neck to mumble his grunt and taste the blood. He licked it off as he pounded into his lover.
“Damn…My love I’m close…” Ryusui was intoxicated. He wanted to continue but his head was filled in ecstasy.
“It’s ok, me too…” Senku whimpered softly, hugging Ryusui, sucking on his neck. Ryusui came into Senku and laid him back onto the crates. He pulled out, seeing his mess all over his thighs and stomach from Senku’s cum. Senku’s chest was heaving. Admiring the shadow of his boyfriend under the moonlight and seeing his silhouette of how built he is. No wonder the girls and some guys were envious of him. Not because of his brain or his position in the new world, it was because of his boyfriend. They pulled away, both breathless, covered in sweat and cum, completely spent beneath the creaking wooden hull.
Senku was glistening under the moonlight, Ryusui wanted to take a picture of this moment and imprint it in his mind. He felt satisfied, this moment was for his very eyes no one else could ever see how disheveled the leader of the kingdom of science looks. Ryusui was staring up at Senku with pure, dazed worship. He realized a terrifying truth, while he might be the king of the ocean, Senku completely owned him. Being the captain and a wise general of the Kingdom of Science, Senku had more power than him. He loved the idea of being tamed and controlled—even going as far as to disregard his title of owning everything about him. His boyfriend owning everything about him, his body, his smile, his sight, made him feel so loved.
Ryusui grabbed a towel by a crate and cleaned Senku off gently, his feather-light touch sent goosebumps around Senku’s body. He successfully cleaned Senku and let Senku rest as he cleaned himself off. “You were amazing, my love.” Ryusui's voice was ragged but it didn’t bother him. He leaned for a peck and gave him his signature smile.
Senku was intoxicated by being dazed but gave him a soft smile. “Thank you Ryu. You were perfect…I love you.”
Ryusui smiled and hugged him tightly. “Love you more, my treasure.”
—ᯓଳ
A few days later, the Perseus was more than half way to America. Ryusui had been sitting on the island table with François, venting a rare feeling of vulnerability.
"Senku completely spoils me, François. He hands me custom barometers, he fixes my ship, yet he pretends to be annoyed when I show him love. He shows his love through raw, mechanical devotion. I want to do more for him, but money and oil can't buy him. Teach me how to cook!" François was taken aback. Not that they were shocked for Ryusui to be vulnerable, they were just happy to see Ryusui step up and do something from the heart.
The king of greed had willingly abandoned his title, stepping up to a scorching stove to learn how to bake a savory dishes, drinks, and desserts entirely from scratch, just so the gift would come from his own heart. As he cooked, his long blonde hair kept falling into his face, François had gently insisted he tie it back, resulting in a messy, high ponytail. Minami had snuck into the kitchen and snapped a picture of the rare sight of Ryusui having his hair up. He made a simple, yet yummy, fish dish; that was the only thing to make because they were out in the sea. If they were in the modern world he would’ve taken Senku to an expensive seafood restaurant to make up for this meal. He also created a raspberry beer mojitos thanks to François saving fruits from the stollen. He was limited to desserts so he made chocolate ice cream, thanks to the help of science. Another thanks that even in the limited space of the Perseus, his boyfriend was always locked away in the lab with Kaseki and Chrome keeping him even more occupied for this surprise date planned. After every dish, Ryusui proudly smiled at the camera smiling at Minami.
“Hey Yuzuriha…would you be able to help me set up a picnic?” Ryusui nervously asked Yuzuriha. She agreed, and they set up a beautiful picnic with plush cushions in a secluded corner. He cleaned himself up, looked at himself in the mirror and walked down to the lab, wrapped Senku in a warm backhug, kissed his neck.
“My dearest, are you hungry? Want to eat together?” Ryusui kissed along Ryusui’s neck.
“Sure I can eat,” Senku agreed.
“What the hell, you freak!” Ryusui blindfolded him and led him up to the deck. “My love you need to be patient, I can be freaky later if you want.” Ryusui smirked as he led Senku to the back deck.
“Ok we are here!” Senku pulled the blindfold down, his crimson eyes widened completely.
The sun was setting over the Pacific, the entire sky was beautiful with vibrant streaks of gold and dark orange. Right in the center of the blanket was a picnic basket, perfectly positioned in the middle with flowers with a light blue blanket on the bottom and light yellow pillows to sit on. The sunset makes it a cherry on top of the beautifully designed picnic.
Ryusui had sat cross-legged with a proud, radiant smile. "Sit, my dearest! I made the food myself. Every single ingredient was handled by these very hands!"
Senku had stood frozen, with a teasing smirk crossing his lips to hide how hard his heart was beating. "Heh. Nice try, Captain. Ten billion percent of the evidence points to François making this." He says grabbing a blueberry from the plate by the dessert.
In response, Ryusui had proudly pulled out a wooden frame containing Minami’s photograph of him in the kitchen, his hair pulled back into that high ponytail, intensely cutting the fish. “Ha! Ha! My love, I can’t believe you don’t trust me, my heart hurts.”
Senku stared at the photograph. His teasing smirk completely faded from his face, replaced by a soft, genuine look of awe and his eyes drifted over the minor burn marks on Ryusui's fingers, and then his gaze settled back on the photo, lingering on how the ponytail exposed the sharp, handsome line of Ryusui's jaw and neck.
A sudden spark of pure, genuine emotion shone in Senku's eyes. He leaned forward slightly over the picnic tray, a heavy smirk playing on his lips.
"Well, damn. I stand corrected, and honestly? You look ten billion percent good in a ponytail, you should style your hair like that more often, Ryu." Ryusui blinked, entirely caught off guard by the sudden, open display of affection.
“But thank you for this Ryu, I appreciate it,” Senku says with a soft smile reserved for his boyfriend.
A red flush crept up his ears, followed immediately by a sharp smirk. He leaned across the tray, capturing Senku’s lips in a sudden, deeply affectionate kiss that tasted like the blueberry he ate. When he pulled back, his eyes were burning with pure, unyielding devotion. "For you, my treasure, I will do anything."
Senku slowly sat down on the blanket, crossing his legs opposite Ryusui. He took the photo frame, his hand resting securely over Ryusui's calloused, burnt fingers, squeezing tight.
"You really are an idiot, Ryu," Senku whispered, his voice incredibly gentle as he looked at his boyfriend under the bleeding colors of the sunset. "But... Really thank you, it looks perfect."
Ryusui proceeded to serve Senku his fish dish with fresh stollen and poured him some raspberry beer mojito. “Cheers my love, to our relationship and us defeating Why-man in the future so we can get married.”
“Tch. Is this you proposing to me Ryu? Not very in character for you.” Senku snickers as they clink glasses, and takes a sip of the mojito, not losing eye contact with his boyfriend.
“No no no my dearest I’m just letting you know a proposal will be soon, you know me, I’m planning a huge proposal for you.” Ryusui drank his creation and enjoyed it, a perfect amount of bitter and sweet.
They ate everything and got up with their mojito and walked to the deck, looking out to the ocean that was gaining moonlight. Ryusui held Senku, kissing his neck, as Senku gulped down his mojito to turn around and kiss him. Ryusui pulled away, giving Senku a peck. “I love you my dearest Senku,” Ryusui said with a soft-spoken expression. Senku looked up at Ryusui and playfully rolled his eyes. “I love you too Ryu.”
—ᯓଳ
The next day in the laboratory, Senku placed the frame of Ryusui cooking, on top of his work bench alongside his other two favorite photos. He gazed at it with a kind smile, the newly added photo of Ryusui in his messy ponytail, covered in flour and intensely fighting the dough for the stollen, which Senku had proudly mounted right at eye level. Whenever he usually gets stuck on any experiment he looked up at that frame, seeing his ridiculous smile with dedication of his greedy captain was ten billion percent more effective than any dose of scientific caffeine. It was his ultimate motivation to see how hard his boyfriend worked to make him his meal.
Right beside it hung the second frame, which held the photo taken by Minami during that legendary Casino Night. It captured Senku and Ryusui posing together in their formal attire. Ryusui had his arm hooked possessively around Senku's waist, and Senku looking directly at the lens with a sharp, matching grin. The third frame held a massive, wide-angle shot of the entire Kingdom of Science family photo against the ship. It was his favorite because it looked like a family photo, his very own family photo. It was Senku's private sanctuary but Chrome and Kaseki frequented the room often, and they had an unspoken rule about the new decor.
Chrome stepped into the lab to drop off a basket of iron sand. He paused, his eyes drifting up to the frame of Ryusui covered in flour, then down to Senku, who was fiercely scribbling math with a remarkably soft expression.
Chrome grinned, leaning over to Kaseki, who was polishing a set of brass gears nearby. "Hey, look at that," Chrome whispered, nodding toward the beam.
"Our cocky scientist really has it bad for our sailor, huh? He's completely in love with the captain." Kaseki let out a soft, hearty chuckle, his eyes crinkling with warmth as he watched Senku completely ignore them in favor of his work.
"Ah, let him have it, Chrome. It’s sweet. It gives him motivation by looking at the person he loves." They didn't tease him or bring it up out loudly, since it’s a part of life for loving someone, they just quietly appreciated how much softer their fierce leader had become since letting the greedy sailor into his heart.
Senku caught the tail end of their whispering and, without looking up from his parchment, he casually tapped his pencil against the desk. "If you two gossipers are quite done standing around analyzing my relationship, those gears aren't going to calibrate themselves. Move it, or I'm going to give you more work.”
Chrome laughed, rushing back to his station. Senku rolled eyes, a fond smirk tugging at his lips as his gaze drifted right back up to the ponytail photo on the wall. He adjusted his tools, looking at the new photo printing it in his mind to continue his work.
—ᯓଳ
After a busy day, Chrome and Kaseki had left to rest in their rooms, leaving the laboratory silent save for the rhythmic, low hum of the ship slicing through the waves and the soft bubbling of a lone distillation setup. Senku was still hunched over his desk, the faint glow of an oil lamp casting long, sharp shadows across his exhausted face. He wanted to continue mapping out what to do once they reach American soil and get corn.
The heavy wooden door creaked open, breaking his concentration. Senku didn't look up, expecting it to be an overly anxious crew member, visiting him late at night. A sudden warmth draped over his back, a strong and familiar arms wrapped securely around his chest, locking him in a tight backhug. Ryusui had snuck away from his captain's quarters and buried his face directly into the crook of Senku's neck, letting out a low, content sigh. "I knew I would find you here, my scientist. The moon is high, and everyone is asleep. It’s time to abandon your work and come lay with me."
In public, Ryusui was the grand greedy king who showed his love to his boyfriend. In the dark, Senku’s subtle and deeply affectionate nature entirely took the wheel, he grew soft around Ryusui. Senku dropped his pencil, his hands moving down to rest firmly over Ryusui's forearms, squeezing them tightly. He let his head fall back against Ryusui's shoulder, a soft hooded look overtaking his eyes as he glanced up at the framed ponytail photo right above them. "Heh. I told you, Ryu. You can’t interrupt my work."
"And I said I don’t care," Ryusui chuckled, leaning down to press a soft, lingering kiss to Senku’s jawline. He fully intended for it to be a sweet, brief reminder to rest. “C’mon let’s go to bed.”
Senku was completely done being apart, and with a slow movement, he turned around within the circle of Ryusui’s arms. He cleared a stack of parchment and blueprints off the edge of the heavy wooden workbench, gently sweeping them aside, and pulled Ryusui close until there was no space left between them. Senku reached up, his fingers sliding into Ryusui's loose blonde hair, and tilting his face down to him.
"My, my, Senku," Ryusui breathed, his gaze softening completely as his hands came to rest gently on Senku's waist. "I thought you were busy. Are you willingly disrupting your sacred work for me?"
Senku leaned down, his eyes burning with a fierce, quiet devotion that completely eclipsed his usual logical detachment. "Work can wait ten billion percent longer," Senku murmured against his lips, his voice a low, incredibly gentle rasp that left Ryusui completely breathless. "Shut up, Captain, you talk too much."
Senku pulled to kiss him this time, and it wasn't fueled by the sharp, chaotic jealousy of Casino Night. It was a slow, deep, worshipful melt with a physical manifestation of a man who had calculated everything in the universe except how deeply he could surrender to another person.
They moved to the small cot in the corner of the lab, shedding the weight of the world along with their clothes. In the dim, flickering light of the oil lamp, Senku handled Ryusui’s body with absolute, tender reverence. He didn't rush. He traced his fingers over the faint burn marks on Ryusui's hands from the kitchen, pressing soft, lingering kisses to his knuckles, his wrists, and the sharp line of his jaw. Keeping eye contact after every kiss, he loved his boyfriend so much.
Senku used his hands and mouth with a gentle focus on making Ryusui feel cherished. He loved the way he could melt the composure of the arrogant captain, reducing the proud king of the seas to a soft, sighing mess who locked his fingers into Senku's hair just to pull him closer.
In the quiet sanctuary of the lab, beneath the glowing moonlight and the framed photos of their shared life, Senku was very much open when it came to being intimate with his boyfriend. He whispered quiet confessions against Ryusui’s skin, anchoring his forehead against Ryusui's as they moved together in perfect, slow harmony. It was peaceful, heavy with emotion, and entirely absolute.
“C’mon Ryu. Let’s go to sleep.” Senku pulls Ryusui away to the Captain’s headquarters. They were away from the crew giving them proper privacy as they rested. Senku led the way to the room, closing the door and opening the shutters, letting in the moonlight. Ryusui undressed himself by removing his hat, cape, and his shoes. He undressed Senku, leaving him with his undershirt and shorts under his clothing. Ryusui had a similar outfit underneath his orange clothing. They laid down together looking up at the ceiling, Ryusui calmly got up and put his hand on Senku’s mouth and caressed his lip.
“You’re so beautiful, my love.” He leaned into a kiss. A gentle nibble on his top lip allowed him to flick his tongue against Senku’s tongue and tasted him. He pulled away, pressing a light peck on his lips, while smiling. Ryusui’s right hand slipped inside Senku’s shorts and fondled his hand on his dick. “Mffpgh.” Senku moaned as he grinded up, giving more room for Ryusui to jerk on his cock. A gentle squeeze and stroke gave Senku goosebumps, before he could moan again Ryusui slid his tongue into Senku’s mouth and kissed him. The wet sounds of their kiss and the sound of Senku’s cock being rubbed by Ryusui made him cum slowly ooze out of him. Senku fully came onto Ryusui’s palm, who pulled it out of Senku’s shorts and licked it all clean, making Senku taste himself as they kissed. The savory, salty, tangy taste of his cum made him feel pleasure. He loved how the little things Ryusui knew how to take care of him. They pulled away and pressed close to each other’s chests and fell asleep.
—ᯓଳ
By the time the early morning light began to bleed through the porthole, painting the laboratory in soft silver and blue, they were resting tangled together. Ryusui held Senku tightly against his chest, his fingers idly tracing the contours of the scientist's back, his heart full to bursting.
Senku pressed his face into the warmth of Ryusui's chest, his eyes drifting around Ryusui’s peaceful looking face as he slept. Admiring his handsome face, wondering how he even fell in love with a snarky guy like him. Never thought of a greedy man from an opposite lifestyle, he was grateful for finding him and falling in love at the first sight. Ryusui carefully fluttered his eyes open, meeting Senku's gaze and smiled brightly. “Morning, my treasure.” Ryusui caressed Senku’s soft face. Senku smiled. “Morning, my Captain.”
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