Maria, the daughter of the Aizawa family, has a younger fiance named Taro. However, Taro is a precocious boy who has sex with a girl in his class! When he takes a bath with Maria, he shows off his rock hard dick, begs for a blowjob, and ejaculates a lot! He even has premarital sex with her, saying, "We're going to get married anyway..." And before she knows it, Maria is addicted to his dick...