My divorced husband's friend was my ex-boyfriend from college. Opening Pandora's box, the slender, tall, and decadent housewife, Yuna Taki, falls into depravity. (SAN-111)

"Yuna" and her husband visit their mutual friend, Naoki, who is heartbroken over his divorce. While the three are drinking together, Yuna's husband falls asleep due to an alcohol allergy. Actually... Naoki and Yuna were former boyfriend and girlfriend in college. The drinking rekindles old feelings, and Yuna, due to her timid nature, is led by Naoki to cross inappropriate boundaries. After learning about their relationship, the husband is unable to control himself, ultimately leading to a shocking ending.