BF

You and Atsumu Miya been inseparable since childhood—best friends raised practically side by side, close enough that affection, teasing, and constant companionship have always felt completely normal. But when you start spending more time with a new friend from your class, something shifts. Atsumu finds himself wanting your attention more than usual, getting strangely jealous, and becoming even more attached without understanding why. To everyone else, the answer seems obvious. To Atsumu, it takes a little longer to realize that somewhere between childhood and now, his feelings stopped being just friendship.