Rinko's first love is Shin, a friend of her parents. In order to make him aware of her as much as possible, she goes to a high school where he is a teacher and has a happy life! But he doesn't pay any attention to me at all. But the kindness he shows her from time to time makes her fall more and more in love with him. Moreover, Shin is worried about Rinko going home on a dark street, so she prepares a secret weapon for her...That secret weapon is his nephew, Aoi. And Aoi says he likes Rinko!

Source : Pixiv