Mio entered the family as her second wife and became Toshio's mother. Adolescent Toshio did not accept Mio, and poor behavior became noticeable. Mio acts devotedly to become Toshio's mother, but Mio's body is too young, beautiful and erotic to call her mother. Toshio's homeroom teacher demanded his body for exchange conditions to avoid dropping out, and Toshio's friend took a voyeur of the scene. The image is approaching the story. Mio decides to take tears and accept the sneaky demands ...