Natsuki, a sales clerk of a bookstore, and Koji. a high school student. Seemingly nothing in common, they have one thing they can share: books.

A university student finds himself wrapped up in the bizarre world of his next door neighbor, learning about his history and relationship with a girl who changed his life.

Mei has been in love with Yuya all her life. They’ve grown up together. But when they reach their second year of middle school, Yuya suddenly professes his love for…