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2025-08-21
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I'm Whatever You Need Me to Be

Summary:

For #ShucaWeek2025 Day 3 - Secret Relationship

"You’re too good at this," Luca said, voice rough with admiration. "Saving me from my own impatience again."

Shu shrugged, a small, rare smirk tugging at the corner of his mouth. "It’s my job."

"No," Luca said quietly, standing. Towering over Shu, he reached out, fingers brushing just barely over Shu’s hand before he caught himself and stepped back. "You’re more than that. You know that, right?"

Shu’s heart stuttered just once, just enough for him to feel it before he masked it behind a calm nod.

"I'm whatever you need me to be," Shu said.

Notes:

(See the end of the work for notes.)

Work Text:

 

 

Conference room-- Kaneshiro Estate



The meeting room smelled faintly of cigar smoke and expensive whiskey. Golden sunlight filtered through the heavy curtains, casting Luca in a halo of light as he leaned back in the leather chair at the head of the long table. Around him, the captains and lieutenants of his syndicate waited, tense and silent, for his word.

But Luca wasn’t looking at them. His gaze was fixed on the man standing just to his right.

Shu Yamino his consiglieré, his shadow, his voice of reason when blood ran too hot.
In this world of power and violence, Shu was the only one who dared to tell Luca "no" and walk away unscathed.

Luca drummed his fingers against the table once, twice. The room stiffened.

"What do you think, Shu?" he asked casually, but the undertone was clear: Your word decides.

Shu’s arms were folded neatly behind his back, his expression unreadable. His dark magenta eyes flickered over the gathered men, weighing their loyalty, their ambition, their fear. Finally, he leaned in slightly, his voice a low, controlled murmur meant only for Luca.

"They're not ready," Shu said. "If you push them now, they'll crack. Give them a little more time... or lose them."

A moment of silence.

Then Luca smiled, slow and sharp like a knife slipping between ribs.

"You heard him," he said, sitting up straighter. "Meeting adjourned."

The captains scrambled to leave, grateful to escape under Luca’s good mood. As the door shut behind the last of them, Luca finally turned to face Shu fully, all his careful restraint slipping away.

"You’re too good at this," Luca said, voice rough with admiration. "Saving me from my own impatience again."

Shu shrugged, a small, rare smirk tugging at the corner of his mouth. "It’s my job."

"No," Luca said quietly, standing. Towering over Shu, he reached out, fingers brushing just barely over Shu’s hand before he caught himself and stepped back. "You’re more than that. You know that, right?"

Shu’s heart stuttered just once, just enough for him to feel it before he masked it behind a calm nod.

"I'm whatever you need me to be," Shu said.

And Luca, for the first time in a long time, felt like "need" wasn’t nearly a strong enough word for what burned in his chest when he looked at Shu.

The betrayal came faster than either of them expected.

It was after midnight when Shu caught it a coded message intercepted from one of their own, whispering promises to a rival family. Shu didn’t waste a second. He was already moving when Luca found him, standing in the vast, dimly-lit library of the estate, a cold fury in his eyes.

"Who?" Luca demanded, voice low and lethal.

Shu handed him the evidence, his hand steady even though he could feel the tension rolling off Luca in waves. "Marco," he said simply. One of Luca’s trusted lieutenants or so they thought.

For a second, Luca said nothing.

Then, with terrifying calm, he smiled.

"Bring him to me."

Marco was dragged into the grand hall, bruised and shaking, forced onto his knees at Luca’s feet. Shu stood slightly behind Luca, his presence like a sharp blade tucked against Luca’s spine  invisible but deadly.

"You were family," Luca said, voice eerily soft. "You ate at my table. You swore your loyalty."

Marco stammered, excuses spilling from his mouth. Money. Fear. Promises from the enemy. Shu watched Luca’s knuckles whiten as he gripped the edge of the table.

Luca didn’t look at Marco.

He looked at Shu.

Only Shu.

"How do you think we should handle this?" Luca asked, and everyone in the room knew  this wasn’t about business anymore. 

Shu met Luca’s gaze evenly, unflinching.

"You already know what needs to be done," Shu said, voice quiet but firm.

Luca nodded once.

Then he pulled the gun from his holster and, without hesitation, shot Marco clean through the head.

The room fell into absolute silence, save for the soft click of Luca setting the gun down on the table, careful and precise.

Everyone else backed away, terrified of the calm, controlled monster standing before them.

Only Shu stepped forward, reaching out to brush the blood off Luca’s sleeve, the gesture small but intimate. Luca caught his wrist, holding it for a heartbeat longer than necessary.

"You’re safe," Luca murmured, his voice barely more than a breath. "No one touches you. No one dares ."

Shu looked up at him, and for once, let his guard down completely.

"I know," he whispered.

And in that moment, surrounded by blood and silence, Luca knew he would burn down the entire world if it meant keeping Shu standing at his side.

The body had been cleared away.
The others had dispersed, leaving the mansion heavy with silence.

But Luca stayed in the grand hall, unmoving, the blood already dried on his hands.

Shu found him there, standing in front of the fireplace, his broad shoulders tense, golden hair catching the flicker of the flames. He looked almost... lost.

Quietly, Shu approached.

"You did what you had to do," Shu said, voice low and even. "You protected your family."

Luca didn't answer right away. His hands were clenched at his sides, shaking just slightly a tremor no one else would have noticed.

Except Shu.

Except Shu, who knew him too well.

Without a word, Shu reached for him, taking one of Luca's hands in his own. He guided him gently to a nearby chair, pushing him to sit. Luca didn’t resist.

Shu knelt before him, pulling out a cloth and a small bottle of rubbing alcohol from his coat pocket. Always prepared. Always thinking ahead.

Luca hissed softly as Shu cleaned the blood from his skin, careful, methodical, almost tender.

"You’re not angry with me?" Luca muttered, voice rough like gravel.

Shu paused, glancing up.

"No," he said simply. "You made a hard choice. You protected us. You protected me ."

Luca swallowed hard, the weight of it hitting him all at once  the guilt, the relief, the sheer overwhelming need he had for Shu’s approval.

"You’re the only reason I can still breathe after doing things like this," Luca admitted, voice raw. "The only thing that keeps me from turning into a monster."

Shu set the cloth down and cupped Luca’s face in both hands, gentle but firm.

"You’ll never be a monster," Shu said quietly. "Not while I’m here."

For a moment, Luca just stared at him, as if trying to memorize every detail of his face. Then, slowly, hesitantly, he leaned forward their foreheads touching, a silent prayer shared between them.

No titles. No blood. No fear.

Just Luca and Shu, breathing in the same space, holding each other up in a world that only wanted to tear them down.

"I'm not going anywhere," Shu whispered.

"You better not," Luca murmured back, a shaky laugh caught somewhere in his throat.

And for the first time that night, Luca finally let himself close his eyes, knowing Shu would guard him even when he couldn’t guard himself.

The fire had burned low, casting soft shadows across the room. Shu was still kneeling between Luca’s legs, hands gently resting on his knees, the silence between them filled with unspoken things.

Luca’s gaze lingered on him not with the eyes of a mafia boss, but as a man completely, utterly consumed by the person in front of him.

“You always take care of me,” Luca said softly.

Shu’s lips curved into a faint smile. “Someone has to.”

A quiet beat.

Then Luca leaned in, voice barely audible.

“Can I...?”

Shu didn’t move away. He didn’t speak. He just tilted his head, closed the distance by a breath, and met Luca halfway.

The kiss was soft at first, hesitant, almost reverent. Like they were both afraid to shatter it, to wake up and realize it wasn’t real.

Luca’s hand found Shu’s cheek, cradling it like something precious, while Shu’s fingers tightened slightly on Luca’s knee for balance  or maybe for grounding.

Then, like a dam breaking, it deepened.

Luca pulled Shu closer, needing him like air, tasting the unspoken years of tension between them, the fear, the loyalty, the devotion neither of them had dared to name. Shu kissed him back with quiet confidence, as if he’d been waiting for this only this and nothing else ever mattered.

When they finally pulled apart, both of them breathless, Luca pressed their foreheads together again, eyes fluttering shut.

"Shu…"

"I know," Shu whispered. His voice was barely a sound, but his heart was in every syllable. "Me too."

And in that moment, amidst shadows and gunpowder and blood already washed away, they weren’t mafia boss and consigliere.

They were just two people finally choosing each other.

 

The next morning

 

Shu woke first.

The room was quiet, bathed in the soft gray light of dawn. He blinked slowly, adjusting to the warmth draped over his side Luca’s arm, heavy and relaxed, holding him like he hadn’t meant to let go even in sleep.

They were still fully clothed, tangled awkwardly on top of the covers, like neither of them had known what to do after the kiss except stay close .

Shu turned just enough to look at him. Luca was still asleep, golden lashes brushing his cheeks, mouth parted slightly. He looked peaceful like this unguarded in a way no one else ever got to see.

Shu felt his chest tighten.

It should’ve been dangerous, letting things get this close.
But it didn’t feel dangerous.
It felt inevitable.

He gently pulled away, slipping out from under Luca’s arm with practiced care. As he stood to adjust his coat and smooth his shirt, he heard Luca stir.

“Mmm… Shu?” came the sleepy, hoarse mumble.

Shu froze. “Sorry. Didn’t mean to wake you.”

Luca sat up slowly, blinking at him with sleep-heavy eyes. Then he smiled a small, crooked thing that was too soft for the man who ruled half the city.

“I thought it was a dream,” he said.

Shu glanced over his shoulder. “Was it?”

Luca shook his head. “Not unless I’m dreaming now, too.”

They looked at each other for a long moment. Then Shu gave the smallest, shyest smile.

“Good.”

 

Later that day 

 

Shu was back in full consigliere mode: calm, composed, precise. He walked into the strategy room with a tablet in hand, briefing the others like nothing had changed.

But people noticed .

Claude raised a brow when Luca entered the room and immediately gravitated to Shu’s side.
Sonny gave Shu a look when he caught him staring just a little too long during the meeting.
Even Ren, who never noticed anything, blinked twice and muttered, “Wait… since when are they…?”

Luca ignored it all, leaning back in his chair with a smug, suspiciously well-rested air.

Shu, of course, said nothing.

Until everyone cleared out.

Then, as Luca passed behind him, Shu murmured under his breath without looking up from his notes:

“You’re being obvious.”

Luca grinned. “So? let them see.”

Shu sighed, fond and exasperated all at once. “You’re going to get us in trouble.”

“With who?,” Luca said, voice low and teasing, “I’m the boss around here, am I not?.”

Shu’s ears flushed pink. He didn’t respond.

But he didn’t stop Luca when he reached down and brushed his fingers just barely over his hand, either.

 

A neutral mafia gathering 

 

The ballroom glittered with false civility. Crystal chandeliers, designer suits, champagne flutes  all of it a performance masking the danger simmering beneath every smile.

Luca kept his hand lightly on Shu’s back as they entered, a quiet gesture of possession and protection both. He always hated these events. But with Shu beside him, he could stomach it.

Until he appeared.

Enzo Marino.
Boss of the Marino family  a silver-tongued snake with too much money and no sense of boundaries. He made a beeline straight for them, smile like poison.

“Luca! A pleasure,” Enzo drawled, shaking his hand too warmly. Then he turned to Shu. “And you must be the famous consigliere. I’ve heard so much…”

Shu bowed his head slightly, polite but cool. “Only the good things, I hope.”

“Oh, only the best,” Enzo purred. “Though I must say… they didn’t mention how beautiful you are.”

Luca’s hand on Shu’s back tensed.

Shu blinked, recovering smoothly. “I’m here to represent the family. Not to entertain.”

“Entertaining you would be my honor ,” Enzo said with a smug grin. “If you ever find yourself wanting more than the Kaneshiros can offer…”

He let the implication hang in the air.

Luca moved before Shu could respond.

He stepped forward, towering over Enzo, his light purple eyes glittering with ice. The whole room seemed to quiet a little.

“I don’t think you understand how very replaceable your mouth is,” Luca said, smile sharp as glass. “My consigliere doesn’t need your compliments. And if you speak to him like that again, I’ll make sure you never speak at all.

Enzo went pale, swallowing hard. “L-Luca, I meant no offense—”

“You meant to cross a line,” Luca interrupted, his voice low and dangerous. “Don’t mistake my patience for weakness.”

Enzo backed off with a tight smile, muttering something about drinks as he disappeared into the crowd.

Shu let out a slow breath. “You didn’t have to do that.”

“Yes I did,” Luca said, still seething. “He touched you with his eyes.”

Shu raised an eyebrow. “So? You do that all the time.”

Luca didn’t skip a beat. “Yeah, but I earned it.”

Shu blinked. And then he laughed . A soft sound that made Luca’s chest ache.

“You’re ridiculous,” Shu said.

“I’m yours, ” Luca corrected, stepping closer so only Shu could hear. “And you’re mine. Let them all know.”

 

Back at the estate — a few hours after the gala

 

The door slammed behind them.

Shu shrugged off his coat with controlled frustration, laying it over the arm of the couch with more force than necessary.

Luca stood by the door, arms crossed, purple eyes stormy. "You’re mad."

Shu turned, slowly. "You threatened someone in the middle of a neutral event."

"He flirted with you," Luca snapped. "Right in front of me!"

"I could’ve handled it."

"I know you could’ve!" Luca’s voice rose, then fell again, rough around the edges. “That’s not the point. You’re not just anyone, Shu.”

"And that gives you the right to act like you own me?"

"I don’t own you!" Luca stepped forward, jaw tight. "But I’m in love with you. And when someone tries to treat you like some pawn they can steal, I see red ."

Silence.

Shu’s heart skipped a beat.

"You’re in love with me?" he repeated, voice quiet.

Luca blinked, realization hitting him like a bullet. "I–"

“You said it like you’ve known for a while.”

Luca exhaled, stepping closer. “Yeah. I have.”

Shu stared at him, something unreadable flickering behind his violet eyes. Then, before Luca could speak again, Shu grabbed him by the collar and pulled him in .

The kiss was not soft this time.

It was hungry, angry, desperate, and real. All the words they hadn’t said, the tension from earlier, all of it spilled into that kiss.

Luca groaned into it, gripping Shu’s waist, slamming him gently back against the wall as Shu tugged at his tie, undoing it with trembling fingers.

“You’re an idiot,” Shu muttered against his lips. “You make everything harder.”

“You like it when I make it hard,” Luca rasped, mouth brushing Shu’s neck. “Don’t lie.”

Shu bit back a curse, threading his fingers through Luca’s hair. “Shut up.”

“Make me.”

And so Shu kissed him again, rough and possessive in his own way, until Luca was the one breathless and undone.

They didn’t make it to the bedroom.

That night, between kisses and gasps and whispered confessions against each other’s skin, they stopped trying to pretend it was just about business.

 

Morning

 

The sunlight was warm through the half-open curtains, painting soft gold across tangled sheets and bare skin.

Luca stirred first, this time a rare thing. His arm was wrapped protectively around Shu’s waist, holding him close like his body hadn’t gotten the message that the danger was over.

Shu lay facing him, eyes still closed, breath even.

Luca just looked at him.

It didn’t feel real. That this man was so sharp, so guarded, so beautiful  was here in his bed, lips parted slightly in sleep, hair a little messy from last night.

Luca reached up and gently brushed a strand from Shu’s cheek.

“I know you’re awake,” he murmured.

Shu hummed without opening his eyes. “Didn’t want to move.”

“You’re allowed to stay.”

That made Shu open his eyes, slow and soft.

Luca gave him a half-smile. “Still mad at me?”

“Only a little,” Shu said, voice husky with sleep. “But I don’t regret anything.”

“Me neither.”

They lay there in the quiet. The city outside buzzed faintly, but in this room, time had slowed.

“You meant what you said last night,” Shu finally asked. “About being in love with me?”

Luca met his eyes without hesitation. “Yeah. I did.”

Shu was quiet for a moment, then exhaled. “I’ve been in love with you for a long time too.”

Luca blinked. “Wait— what ?”

Shu smirked just a little. “You’re not the only one who can keep secrets, boss.”

Luca groaned and pulled him close again, burying his face against Shu’s shoulder. “You’re going to be the death of me.”

“I’ll make it a soft death,” Shu teased, running his fingers through Luca’s hair.

“Promise?”

“I promise.”

 

Kaneshiro Estate, main lounge

 

Shu was seated in one of the estate’s luxurious yet tastefully intimidating sitting rooms, reviewing intelligence reports with practiced focus. The fire crackled behind him. The vibe was all shadows, dark velvet, and very expensive silence.

Until Claude walked in with his usual smugness.

“Y’know, Shu,” he said as he dropped onto the leather armchair opposite him, “I’ve been thinking.”

“Dangerous,” Shu muttered.

Claude smirked. “If— hypothetically —our beloved boss were to suddenly marry someone, I feel like you'd already have the role on lock.”

Shu paused. “What role.”

Claude raised his brows. “ The mafia wife. Obviously.”

Shu blinked slowly. “I’m going to pretend I didn’t hear that.”

“Oh come on.” Uki joined in, sipping coffee like this was a completely normal conversation. “You basically already act like his spouse.”

“Literally brought him a change of clothes and coffee after last week’s shootout,” Sonny added, flipping a pen in his hand. “We’ve seen the way he looks at you.”

“I’m his consigliere ,” Shu said flatly. “It’s my job to take care of him.”

“Mmm,” Claude drawled. “Is it your job to button his shirt for him too?”

Shu’s ears turned a little pink.

“That happened one time, ” he muttered.

“You adjusted his tie for him this morning,” Uki added. “He looked like he wanted to kiss you or die trying.”

Sonny walked in behind them, throwing himself dramatically onto the couch. “Can’t wait for the wedding. The Kaneshiro Estate would look insane, covered in white roses.”

“White—what are you—”

“Don’t forget the throne seats for the bride and groom,” Claude chimed in. “Shu in something elegant and traditional, maybe? Luca would lose his mind.”

Shu’s entire face flushed. “I am his consigliere. I manage security, business, and logistics. Not flowers and fabrics.

Sonny gave him a mock-sympathetic look. “Denial’s a stage of grief, bro.”

Before Shu could deliver a snarky rebuttal, the double doors opened and Luca strolled in, golden and careless as ever.

“What are we talking about hmm?” he asked lazily.

“Just planning your wedding,” Claude said.

“To Shu,” Uki added helpfully.

Luca paused. Looked at Shu. Smirked.

“Oh?” he said innocently. “ Are we getting married Shu?”

Shu looked like he was deciding between stabbing something or walking into the fireplace.

“You all have work,” he snapped, standing up and gathering his papers. “Do it. Now.”

He brushed past Luca on his way out but not before Luca leaned in just a touch and murmured so only Shu could hear:

“Traditional, huh? You’d look real pretty in that.”

Shu didn’t even turn around. But the tips of his ears were red all the way to the hallway.

 

Kaneshiro Estate, Luca’s private office — late evening

 

Luca was reviewing shipment records when the door slammed open.

He didn’t flinch.

Shu stood in the doorway, arms crossed, eyes burning. “You enjoyed that.”

Luca leaned back in his chair, the low lamplight casting a golden glow over his smug expression. “Enjoyed what?”

“The teasing. All day . You could’ve shut it down.”

“Could’ve,” Luca agreed, lacing his fingers behind his head. “But you looked so cute when you were flustered.”

Shu stepped forward, quiet but sharp. “You know we agreed to keep this quiet.”

“I am being quiet,” Luca said. “I didn’t say anything. They’re just very observant .”

“You didn’t have to say anything,” Shu snapped. “You winked at me in front of them. You touched my shoulder. You let them call me your—”

He cut himself off, jaw tense.

Luca stood slowly. Walked around the desk. “Call you what?”

Shu narrowed his eyes. “You know what.”

Luca stopped in front of him, close enough to touch. “You mean ‘my mafia wife’?”

Shu looked away. “It’s humiliating.”

“It’s true ,” Luca said softly.

Shu’s head whipped back toward him. “What?”

“You are mine,” Luca murmured, reaching up to gently fix the collar of Shu’s coat. “Not because you wear a ring, but because you’ve got my back. Because you never run. Because I trust you with everything.”

Shu’s breath caught.

“And yeah,” Luca added, voice lower, leaning in, “I like when they see it. Just a little. Makes me want to show them who you really belong to.”

Shu stepped back, cheeks hot. “You’re impossible.”

“And you’re blushing.”

“I am not—

Luca kissed him. No warning. Just heat , all teeth and fire and want.

Shu gasped against his mouth, grabbed his lapels, pulled him closer like he hated him for making this feel so good.

When they broke apart, breathless, Shu glared at him.

“You’re making this really hard to keep secret.”

Luca grinned, pressing his forehead to Shu’s. “Then maybe stop trying.”

They hadn’t moved far. Shu stood with his back to the window now, arms crossed again — but this time, not out of defiance. He looked… conflicted.

Luca leaned against the edge of his desk, watching him quietly.

“I’m serious,” Shu said, softer now. “Keeping this quiet it’s not just about appearances.”

Luca tilted his head. “Then what is it about?”

Shu didn’t answer at first. He looked out the window, past the estate walls, toward the city lights.

Finally, he said, “You’re the boss of the Kaneshiro family. Every move you make is watched. Every weakness… used.

Luca’s expression darkened. “You think you’re a weakness?”

Shu didn’t look at him. “I think they’ll try to make you believe I am.”

Luca stood, closing the space between them. He didn’t touch Shu this time — just stood beside him, looking out at the same lights.

“You’ve protected me more times than I can count,” he said. “You’ve pulled bullets out of my side, lied to my enemies, and cleaned up blood. I should've removed myself.”

Shu stayed silent, jaw tight.

“I don’t need a soldier who dies for me, Shu.” Luca’s voice dropped. “I need you . All of you.”

Shu’s throat bobbed. “Even if they use me to get to you?”

“They’ll try,” Luca said. “And they’ll fail.”

He finally reached out, just brushing his fingers over Shu’s knuckles. “Because I’d burn the world before I let anyone touch you.”

Shu finally looked at him …really looked. Eyes glossy, voice barely above a whisper.

“You can’t promise that.”

Luca didn’t blink. “Watch me.”

Just then—

Knock knock.

The door creaked open a few inches.

Claude’s voice came through, far too casual. “Hey boss, quick question about the—oh.”

The silence was deafening .

Shu immediately stepped back, trying to school his expression, but Claude was already grinning.

“Sorry, am I interrupting your married people moment?

Luca’s sigh was long and tired.

“Claude.”

“Right, I’ll come back in… I dunno, twenty minutes?”

“Ten,” Luca growled.

Claude winked and shut the door again.

Shu groaned into his hands. “We’re never going to hear the end of this.”

Luca chuckled. “Nope.”

Then he leaned in again, lips brushing Shu’s ear.

“But you’ll always hear it from me first.”

 

Notes:

Hello everyone! My name is Jeanine or G9 (twitter: @enchantedheists). As you can probably tell, I’ve been utterly consumed by Shuca and this event has helped me break out of my writer’s slump. I’ve been in the fandom for a while now, watching the famous Shuca dynamic unfold, and it’s been living rent-free in my mind ever since. I used to write a lot for my previous fandom, but things got a bit toxic there, so I wandered aimlessly through the interwebs until I stumbled across Shuca and the Shuca nation.

At first, I was quietly consuming all the amazing fanworks of the VTuber world from my main Twitter account. But when I discovered #ShucaWeek2025, it pushed me to finally make an AO3 account from scratch and even a shipping sub-account on twitter just so I could be brave enough to say out loud: I love Shuca!

So yeah happy Shuca Week! Huge thanks to the organizers, because this has genuinely helped me embrace my love for writing again. Truly blessed!

A quick note about the fic: apologies in advance for any grammatical errors or typos English isn’t my first language, and my only beta reader is my brother (shoutout to him!). Speaking of which, I actually used my brothers’ names for the mob characters in this fic Marco (my twin and beta reader), Enzo, and funnily enough, I even have a brother named Claude. Don’t worry, they know and they’re used to it I always sneak their names into my stories (i have 8 brothers) haha.

Anyway, i really, really love the Mafia Boss x Consigliere AU trope, so this fic is extra close to my heart. I hope you enjoy it, and I’d love to hear your thoughts! Also let’s be friends on twitter!!