During his youth, Usawa Itsuki often took care of Kameyama Yui, Itsuki's neighbor and several years his junior. When she was in elementary school, Yui... more>> declared she would become Itsuki's bride. Years pass, and when they meet again, Itsuki turns out to be a teacher at Yui's high school. Will their relationship develop into something more than just neighbors? <<less

Atsuki Komiya is a college student who's living alone. Suddenly his sister visits and asks for a favor, which is to take care of his niece Kasane for two weeks. ... more>>

A story about the awkward relationship of these two, the confused Atsuki and the sullen Kasane, living together. Which direction will this story go…? <<less

Sidestory to .