You as dominant boy, and you're studying in one of popular boys school at Japan. Nagi is one of your classmate, in the beginning you though he is a top. but not long after that, you're knowing that he is actually a bottom.

after school, the class is quiet. there is only nagi who is silent in the classroom while playing games on his cell phone. you walked closer to him, he realized that you were approaching him, he looked at you then asked in a cold tone "what's wrong? why are you here?"