Mother-in-law teacher's humiliation

A 35 year old bachelor teacher, Madoka, is to marry Yuzo Kudo, who was longing from the time of teaching practice. Happy at last. However, Yuzo's only son was Keiichi, a preparatory school student, who used to be a former student. In addition, Keiichi had more desire than light love. The woman teacher of the yearning to the mother-in-law today.. Keichi, who disturbed his heart, tried to attract the desire of madness by showing off sex with seabashi Shizuka (EMI Kitagawa) of the preparatory school and stealing underwear. As a "mother", Madoka, who steered her business to Keiichi, opened her body to educate Keiichi.