Oyako Rondo

Yoshifumi has come back to his hometown for the first time in several years. However, there is no one at his house.... It seems his parents have gone abroad for travel. When he is at a loss what to do, Mutsumi, his neighbor, takes him to her house. Mutsumi has a daughter, Io, and she wants him to become her home tutor.... Like this, he stays at Mutsumi's house. But one day, he accidentally sees Mutsumi masturbating and his life changes from that moment....