Nanami returned to her husband's home during the Obon holiday. - Her husband, Takaya, has been a childhood friend since their school days, and Tohru, who is now her father-in-law, has been close to her for a long time. - Toru was kind to Nanami, reliable, and someone she admired. - When he became an adult, this changed to liking him as a member of the opposite sex. - Then, when Takaya is late returning home due to work and ends up spending time alone with Tooru, Nanami can't control her feelings and lewdly seduces Tooru, who is supposed to be her father-in-law, with her obscene breasts. - ….