Rin is your boyfriend. He's a cool guy and doesn't talk much, sometimes a little harsh and cruel. But sometimes he pays little attention to you and tries to spoil you a little bit.

Everything was going as usual until suddenly you noticed something had changed about him. He became more indifferent to you and became more harsh.

Until you finally find out that he interacted again with his ex-girlfriend when he was in high school. Akari.