Yo didn’t expect high school life to be a whirlpool of lust and regret. He feels trampled on by Mitani, the girl he has had a crush on for as long as he can remember. He also can’t forgive himself for upsetting Kei, the one person who seems to fully understand him. And when Yo realizes how much he has hurt the people around him, anguish and panic lead him to do something that shocks not only Kei and Mitani, but his entire class.