Masao Kinosaki lost her mother when he was in junior high school and lived together with his father (hajime). But his father suddenly leaves home as Gansu enters college. Leave only the note that I do not worry – Four years have passed since then, although it was a genuine ahead of graduation, I could not recover from my mother’s death yet, I was dragging in the form of female phobia. One day. The father’s father came back home with his married partner. Shimpei Arima (Arima Shiori), despite its appearance, also had no inconvenience in character, it was exactly the ideal mother. Self-puzzled life in living together with a new mother suddenly started. Shiori envelops such true life, with its brightness and kindness. While touching her, God will gradually be attracted not as a mother but as a woman. What is the action taken by Shiori who realized that?