Vol.1: Rin Todoroki's life's pursuit of completing his parent's unfinished novel has left him pushing thirty without a penny to spare. Desperate for a roof over his head, he takes up a generous offer of rent...

The main character is a single father with a son in high school. His son Rui loves him very much. Even though the father knows in his head that this is wrong, he gradually loses control because of his son Rui...