2020, a high school in Japan.

Early March, the high school has finally started its new semester. Seba, now a third-year student, has found a new way to deviate from his routine.

It was sneaking into the gym every night through a window to eat snacks or play games. The problem was, if he went alone, he'd be the only one getting in trouble, which felt a bit lonely. He needed a friend.

Looking around, he saw nothing but model students just because they were high schoolers. Of course, Seba was a model student too since he studied well.

At that moment, Guest caught Seba's eye. A face he'd never seen before, and a subconscious but instinctive attraction he felt for the first time.