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I'm sorry, darling, but he's mine.

Summary:

Otoya receives a photo that leads him to prove that Karasu is his alone.

 

—TabiEitaWeek 2025 [Day 4]
•Free Day

Notes:

At first, I wanted to write this for day three because I was tempted by Otoya wearing Karasu's basketball jersey, but then, while writing, the "best friends" (friends with benefits) thing came up, and I thought it would apply to day five. Now that I have the result, I don't think it fits any of the days, so I left it on the free day. 🤷🏻‍♀️

I wrote this very quickly. I would have liked to participate more, but it wasn't possible. 🤧 Anyway, many thanks to the organizers for this beautiful event and to the participants for feeding me Tabieita. 🫶🏻

(See the end of the work for more notes.)

Work Text:

Summer has arrived and with it the long-awaited holidays, so the fraternity has organized a party to welcome it as it deserves. It was Yukimiya's idea, which no one refused, and that's how the "Delta" house ended up filled with college students celebrating their well-deserved break.

 

Otoya loves parties, and if it weren't for Karasu perfectly fulfilling the "left me shaking and..." part, he would surely be on the first floor, dancing until his feet hurt and drinking alcohol until he couldn't even remember the date. He's not complaining at all; the heated afternoon—and not thanks to the summer—he spent with his "best friend" was pleasant, and the hickeys on his skin along with the pain in his butt are clear evidence of that. Yukimiya must be angry with both of them for disappearing after he ordered them to take care of the snacks, but he doesn't care or regret it; fucking Karasu is a thousand times better than spending the afternoon organizing fried foods or sweets.

 

He really loves how Karasu is in bed. Wild. Passionate. Voracious. His hands holding her waist. His lips slowly and lustfully exploring every inch of his skin. His voice, demanding and sensual. His eager gaze, like a predator hunting. His cock penetrating him without mercy, making him moan nonstop. Everything is so good that he could never regret the day when, with excessive alcohol running through their veins, they both ended up having sex. He finds it amusing that, despite promises not to talk about it, let alone repeat it, they ended up tangled between the sheets again, caught up in that tension that never completely disappeared. It would only be when the stress became unbearable, they said, but that was forgotten when the situation became daily, necessary; neither of them said anything about it.

 

The music downstairs is barely audible, thanks to the fact that he is on the third floor and also because the sound of the television interrupts it. Playing FIFA after a busy afternoon is a great plan, which Otoya is enjoying for the moment. Karasu had left a while ago, promising that he would just grab something to eat and come back to the room, but he hasn't returned yet and Otoya didn't think much of it.

 

It is when Otoya wins for the thousandth time with Barça and is about to start a new game that his phone vibrates on the nightstand next to the bed. He ignores it at first, but when he hears it vibrating again, he decides to check it. Otoya slides between the sheets until he reaches his phone and checks his messaging app after picking it up. There are many messages in the fraternity group. Otoya glances at them quickly and reads a few of them halfway through, until one catches his attention.

 

Shidou:

Guess who Karasu is with? 😏

 

And a photo. Karasu in the living room, sitting on the biggest sofa, and next to him, with a neckline that leaves nothing to the imagination, a girl, and not just any girl: Marisa, the easiest girl in the whole university. As attractive as she is shameless. The girl smiles boldly and Karasu stares at her, but Otoya knows very well the meaning of that intense gaze: flirting.

 

Otoya clicked his tongue involuntarily and frowned. He blinked a couple of times, feeling indignant at what he saw and not knowing why. Soon, a sour feeling appeared in his chest and a bad taste attacked his palate as a lump formed in his throat.

 

"It's just Karasu with a girl, nothing special," he tells himself, with conviction that quickly crumbles. "She's just pretty and has a nice body." The lump in his throat only grows as he recognizes her attributes.

 

His finger intends to turn off the phone—although his brain is telling him to smash it against the closet for some reason—but he doesn't. Otoya just looks at the photo with a grimace of disgust that he has no intention of controlling.

 

A moment later, he half-listens to his brain and throws his phone onto the sheets. Otoya then crosses his arms as his mind tries to guess what Karasu and she are talking about, so close by. He can't shake the feeling of exasperation. His leg begins to move anxiously and his teeth bite his inner cheeks.

 

Damn it. He's jealous. It's pathetic, but real.

 

He, being a first-class womanizer with a practically unquenchable libido, hasn't seen a single girl in months because of his relationship with... whatever he has with Karasu, he doesn't care! And what is Karasu doing? He wants to hook up with the easiest girl in the whole university, and although there was a time when he was interested in her, right now he doesn't find anything great about her. On the contrary, Karasu is simply perfect.

 

Tabito is by far one of the most sought-after guys at the university, and how could he not be, when he was the definition of the ideal guy? He studies International Business. He's captain of the basketball team. He has a killer body, which Otoya fortunately knows all too well. Most of the time he is smiling, which always makes anyone nearby blush, including Otoya. Everything about him is attractive, so what is so special about Marisa? One word, four letters: nothing, but... why does he care so much that Karasu manages to find something that catches his attention in her, something to desire?

 

Otoya wraps himself in the sheets and curls up into a ball. He must look pathetic, and for that he is grateful to be alone. Karasu would surely have made fun of him, but to be honest, he wouldn't have cared much if he had, laughing at his angry face and furrowed brow, calling him capricious.

 

Slowly, he pulls the sheets away from his face. Now his anger is mixed with uncontrollable sadness. His eyes are fixed on the television, the video game calls to him to distract himself, but he doesn't feel like it. Wanting to forget the fact that downstairs, Karasu is surely getting closer and closer to ending up in some remote corner with her, his gaze explores the room and, without meaning to, his eyes fix on the wardrobe knob, where Karasu's team shirt hangs from a hanger, and that's when, seeing the number 69, an idea comes to Otoya's mind.

 

He gets out of bed decisively, without thinking twice, takes the jersey, and puts it on, covering his bare chest. Karasu is taller and more muscular. He always used to feel a little envious of that, but now, seeing how the jersey is big enough to reveal the marks on his neck, he loves his slim build too much.

 

Surely, with what he has in mind, many people will find out about his unnamed relationship with Karasu, although that is now irrelevant. In fact, it would be good for everyone to know, especially Marisa.

 

With more confidence than he could have asked for, Otoya left the room, wearing funny slippers, his oldest sweatshirt, and someone else's shirt that was a statement. He walked down the hallways and quickly descended the stairs. With each step, his certainty grew. His hands did not tremble, and doubts did not dare to surface.

 

When he reached the room, he was greeted by loud music and the bustle of all the partygoers. He had taken only a few steps and could already feel curious glances on him, but he didn't care at all; he just focused on finding his target. He finally found her in the same place as in the photo, only this time personal space seemed to have disappeared, and that pissed him off, so he approached her without wasting another second.

 

"How about... we escape to a more private place?" asked the woman, winking, and when Otoya heard her, he knew he had arrived at the right moment.

 

Karasu couldn't formulate a response because a familiar hand landed on his shoulder. He turned around and had to suppress a victorious smile when he saw Otoya wearing none other than his shirt.

 

"Oh, I see you decided to come down," said Karasu. Otoya noticed Marisa giving him an angry look for stealing Tabito's attention.

 

"I missed you, so I had to," he replied, smiling and staring at the older man.

 

Karasu looked him up and down. He bit his lip discreetly before speaking again.

 

"It suits you," the compliment made him feel on top of the world.

 

"Not as much as you," said Otoya.

 

Without hesitation, Otoya sat on Karasu's lap, who didn't seem to be expecting it, but was nonetheless pleased. Eita made sure that the number 69 was right in front of the girl, so she would know that this shirt was more than just fabric, it was a symbol of belonging, that Karasu was his and he was Karasu's.

 

"Everyone sees your marks," Karasu whispered close to her ear as his hands traveled to her waist.

 

"And?" asked Otoya.

 

A laugh escaped Karasu's lips.

 

Otoya changed position. He turned to face Karasu. He felt the older man's hands on his lower back and heard everyone's surprised murmurs perfectly, but what filled him with the most satisfaction was that Marisa was glaring at him. Eita waited anxiously for her to speak, and luckily for him, she didn't take long to do so.

 

"Hey, in case you haven't noticed, Tabi and I were in the middle of something important," she said, her complaint only half disguised as an explanation.

 

Otoya just laughed.

 

"I'm sorry," he said, feigning regret; he even put a hand to his chest for added drama.

 

"I accept your apology. Now, could you..."

 

"I'm sorry, darling," he interrupted her, "but he's mine."

 

And he kissed Karasu. Demanding and uncontrolled, with the intention of everyone seeing it. Marisa's sound of surprise was unique and only encouraged him to kiss Tabito more passionately. It didn't take long for the left side of the sofa to be empty.

 

A total victory.

 

It didn't matter that everyone saw them, because everyone needed to know who Karasu belonged to.

 

The air ran out and they separated.

 

"Now everyone knows about us," Karasu said, though the happiness in his voice was palpable.

 

"I don't think so, we need to make it clear once again."

 

And a new kiss began.

 

Karasu, before letting himself be completely carried away by the lips of his capricious and daring boy, looked one last time at Shidou in the midst of the astonished crowd and silently thanked him for successfully completing the mission he had entrusted to him.

Notes:

Thank you very much for reading. 💗

There is also a Spanish version if you are interested! ✨ It's on my profile.