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It started out as an innocent practice.
A normal, early spring afternoon in the Karasuno gym, the sunlight slipping in through the cracked windows, the sound of shoes squeaking and volleyballs echoing across the polished floors. The second years were buzzing around like caffeine was injected directly into their souls. The first years—eager little pups—were swarming.
And in the middle of it all stood Kageyama Tobio.
Omega.
Setter.
Ridiculously pretty when he wasn't snarling.
And right now, smiling—smiling—at some first year who had dared to serve him an awkward but clearly lovestruck bento.
Tsukishima Kei stood across the court, hands on hips, eyes narrowed behind his glasses, jaw ticking. His usually indifferent gaze had sharpened to surgical precision, tracking every movement of his very much claimed omega.
Not that Tobio acted like it. The damn brat was nodding at them like he wasn’t literally wearing Kei’s scent all over his neck. Like he hadn’t spent the previous night moaning Kei’s name into his pillow. Like his heat wasn’t just two weeks ago and Kei had practically carved his name into Tobio’s soul.
Not that Kei was jealous.
Nope.
Not even when the spiky-haired kid leaned in and said, “Kageyama-senpai, can I maybe… ask you to help me with my tosses sometime?”
Tobio, ever oblivious, nodded in his usual gruff tone. “I can if Coach lets me. You keep throwing too flat—your elbow drops.”
Oh, he's coaching them now.
Tsukishima’s temple twitched.
“Hey, Kei,” Yamaguchi said carefully, handing over a towel. “You good?”
“Peachy.” Tsukishima didn’t take his eyes off the group gathering around Tobio. There were three of them now. Three. All of them juniors. All of them Alphas.
Tobio, in turn, was still smiling. It wasn’t much, just that small, proud upward twitch he gave when he saw progress. But Kei knew what it looked like when that smile was for him. Knew what it felt like when Tobio reached up, just before kissing him and whispering, “You smell so good, Kei…”
Now he smelled like volleyballs and… other alphas.
“Hmm.” Kei rolled his neck. “Excuse me a moment.”
“Are you gonna—?” Yamaguchi didn’t even get to finish the question before Kei was already walking, long strides measured but firm, like a predator sizing up prey.
---
Tobio didn’t notice him at first. He was gesturing at one of the juniors, correcting posture, mimicking a set with his hands in the air.
Until Kei came up behind him and casually looped an arm around his waist.
Not aggressive. Not threatening.
Just… there.
But firm.
And very, very visible.
Tobio blinked, startled. “Kei?”
Kei leaned in, nose brushing the edge of his jaw. “Hi, love.”
The juniors froze.
Kei’s voice was still light, still polite when he said, “Didn’t mean to interrupt. Just came to steal my mate for a sec.”
Tobio’s ears went red. “I—uh, okay?”
He didn’t resist when Kei turned them, subtly guiding him with a palm on his hip, leading them out of the swarm like a gentleman in a ballroom.
The door to the hallway shut behind them. Silence fell except for the distant thump of balls on hardwood.
Tobio frowned up at him. “Kei. What the hell.”
Tsukishima didn’t answer right away. He pushed his glasses up and stared. Then leaned down. “They were swarming you.”
“I was helping them.”
“You were glowing.”
“I always glow.”
“They were Alphas.”
Tobio narrowed his eyes. “And?”
Tsukishima leaned in, nose dragging down the side of his neck until Tobio twitched. “You smell like them.”
“It’s a gym. It’s not like I—”
Tsukishima kissed his gland, open-mouthed and just shy of biting. “Do you want to smell like me again?”
Tobio spluttered. “We’re at school!”
“So?” Kei licked just under his ear. “Let’s fix that. Just a little. No one needs to know.”
“You’re the worst.”
“Mm. But I’m your worst.” He kissed his cheek now, nuzzled soft. “C’mon. Let me be annoying and clingy for two minutes. Then you can go teach your little fan club again.”
Tobio huffed. “They’re not a fan club.”
Tsukishima smirked. “Lies.”
The flush on Tobio’s ears was all the answer he needed.
He didn’t say anything when Kei pressed him gently to the wall, scenting him lazily with skin contact alone. He just breathed through his nose, soft little exhales, eyes fluttering as Kei’s hand dragged across the back of his neck.
“…They asked if I was single,” Tobio muttered at last, barely audible.
Kei stilled. “…What did you say?”
Tobio looked up, face cool as ice. “I told them no. My alpha’s the scariest person I know.”
A pause.
Then Kei laughed. It cracked across the hallway like thunder, bright and unrestrained.
“Oh my god,” he wheezed. “You do love me.”
“Shut up.”
“No, say it again. Please.”
“Absolutely not.”
But Tobio didn’t pull away.
Not even when Kei leaned in again, lips warm on his jaw.
Definitely not when he whispered, smug and quiet, “Next time they ask, just wear my jacket. Or my teeth on your neck.”
Tobio gave him a flat look.
Kei grinned.
Yeah. Not jealous at all.
Only completely, totally, hopelessly gone.
And Kageyama Tobio, despite the rolled eyes and deadpan sighs—
Loved every second of it.
---
End.