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Momo whines again as she curls further into herself on the couch. She's just trying to find her stupid heating pad, but it's not where she thought she left it earlier.
It's three in the morning, and she's trying to be quiet so as to not wake her roommate.
But then a throat clears, and it's obvious that she's failed because then she hears his voice.
“Princess, what’s wrong?” asks Katsuki quietly, a warm hand resting almost hesitantly on her ankle.
“Cramps. I came down here to try to find my heating pad. I didn’t mean to wake you,” murmurs Momo as she tries to uncurl herself, not making it far before she folds again.
“Your heating pad? You took it into your room yesterday,” says Katsuki quietly, knowingly.
“That one is officially dead. I got a new one today, but I can’t find it,” grumbles Momo as she forces herself into a sitting position. “It’s okay though, I'll be fine."
“Princess,” Katsuki sounds somewhere between annoyed and amused, and she can’t look at him. “Do you trust me?”
Momo snorts before she can stop herself.
“I trust you the most, more than anybody I know,” replies Momo seriously as she sees uncertainty dance across his face like it has any right to.
“Come here, Princess,” replies Katsuki as he turns towards her, twisting so one leg is spread along the couch while the other rests on the ground. “Let me help.”
Momo’s brows furrow as she asks, “You know you don’t have to help, right? Periods are gross to guys, I know that all too well, it’s okay.”
“I’m not like those bastards,” huffs Katsuki as he narrows his eyes at her. “Anyone who can’t be supportive during this is a jackass who should be exploded to the goddamn moon and left there. Now, put your back against my chest, and let me fuckin’ help you, Princess.”
Momo doesn’t say anything else, knowing he’ll start asking for names. Instead, she follows his instruction, ignoring the heat that dances over her skin as she rests against his chest.
His hands come around to rest on her stomach, gentle and hovering.
“Put my hands where the cramps are worst, Princess,” murmurs Katsuki in her ear, making her shiver.
It takes her a second to follow his direction, but she does it, putting his hands on her lower belly, just barely above the waistband she’d rolled down earlier to relieve pressure.
Warmth spreads protectively over the spot as her cramps hit, and she melts into Katsuki’s hold, head lolling back on his shoulder.
“You’re a good heating pad,” whispers Momo as she fights back a relieved moan.
“Only for you, Princess,” replies Katsuki with a snort.
Momo realizes a few things all at once as she’s held securely in Katsuki’s arm.
Katsuki’s playing heating pad for her cramps.
Katsuki knows about her period and isn’t running screaming
Katsuki knew about her heating pad.
Katsuki pays attention to her.