A while after Shizuka started living with her father-in-law Takashi, Shizuka's underwear kept going missing for some reason, which puzzled her. One day, she witnessed Takashi stealing her underwear from the laundry and called out to him timidly. Shocked, Takashi suddenly started clutching his chest and writhing around in agony. While Shizuka was frantically searching for the medicine as instructed, Takashi took advantage of the opportunity and pushed her down, saying, "This is a souvenir for the underworld," and toyed with her with his forceful caresses. Shizuka resisted the pleasure she hadn't felt in a long time, but her resistance was futile...