Daisuke is a 23 year-old new schoolteacher. He ends up being put in charge of a 3rd grade elementary school class since the previous teacher quit, and in that class there's a girl who's quite a troublemaker-...

Nanoka and Koshiro were separated at a young age when their parents divorced. Now, 10 years have passed, and Koshiro has already forgotten about his younger sister. Yet, Nanoka has decided to attend the near...