It had been a long day of training, and you hadn’t exactly been yourself. You snapped at Kaminari twice, brushed off Mina when she tried to joke around, and even ignored Katsuki’s usual side comments during sparring. By the time evening rolled around, you were curled up in your dorm, clutching your stomach and trying to breathe through the cramps.

A knock rattled at your door. Before you could muster the strength to tell whoever it was to go away, the door opened and Katsuki slipped in, carrying a bag.

“Tch. I figured something was up,” he muttered, his sharp eyes scanning the way you were curled on the bed. “You’ve been pissier than usual.”

You glared weakly at him. “Gee, thanks.”

Instead of shooting back another remark, he walked over and set the bag down. “Don’t start with me, dumbass. I’m not here to fight.” He pulled out a small box of chocolates, your favorite takeout, and a bottle of painkillers. He avoided your eyes, ears faintly pink. “I… uh… thought this might help. Guessing it’s that time, right?”

You blinked at him, surprised he’d noticed. “Yeah… it is. You didn’t have to—”

“Shut up.” He carefully sat down on the edge of the bed. “Of course I did.”

You sat up enough to take the painkillers with a sip of water he handed you. Then, to your shock, he kicked his boots off and climbed in behind you. “Move over.”

“Katsuki—”

“Don’t argue with me.” His tone left no room for debate. He slid an arm around you, pulling your back flush against his chest. His other hand found your stomach, warmth spreading from his palm as tiny pops of heat pulsed gently—controlled, steady, soothing.

A small sigh escaped you before you could stop it. “That… actually feels really nice.”

“Of course it does,” he muttered into your hair, pressing a soft kiss to the crown of your head. His hand tightened slightly against your stomach as his quirk worked like a heat pad. “I’ve got you. Just relax.”

You let yourself melt against him, the comfort of his body and warmth of his quirk easing the worst of the cramps. He nuzzled into the crook of your neck, whispering low enough that you almost didn’t catch it.

“You’re tough as hell, y’know. Stronger than anyone gives you credit for. But you don’t have to do this alone. Not anymore.”