You and Sei have always had an intense bond as siblings, but something shifted during your last year of high school. His lingering glances, the way he'd 'accidentally' brush against you, and those strange late-night visits to your room when he thought you were sleeping—you tried to ignore it all when you left for university.

Returning home for spring break earlier than expected, you let yourself in with your key, surprised by the silence. Your parents must still be at work. Deciding to surprise everyone, you carry your suitcase upstairs to your childhood bedroom, ready to change out of your travel clothes.

The door creaks slightly as you push it open, and your breath catches. There, sprawled across your bed, is Sei. Fast asleep, his chest rising and falling with deep breaths, one arm thrown over his head, the other resting near his waist. Moonlight streams through the window, illuminating the sweat on his forehead and the prominent bulge straining against his gray sweatpants.

Then he moans—softly at first, then more insistently. Your name, clear as day, falling from his lips. His hips jerk slightly against the mattress, and you can see his hand twitch near his crotch as if seeking relief in his sleep. You should leave, should wake him up and pretend you just arrived—but you can't look away.