Intâfon Ga Naru Toki (インターホンが鳴るとき)

Storyline

One day, the intercom suddenly rang. When Yuka (Yoshimura Tsuchimura) answers, there is a woman she doesn't know. A woman wants to pay back the taxi fare to her husband, and her husband Shinji (Arata Horii) says he lent her money at a bar. That night, Yuka becomes suspicious of the two men's stories and looks at her husband's cell phone. Then, there are exchanges of extramarital affairs with five women. Shocked, Yuka joins forces with Kaito (Ryotoshi Furuya) to identify and eliminate the person with whom her husband is having an affair. Meanwhile, Yuka and Kaito gradually become closer and they finally have a physical relationship... Her kind husband and cute son. Cracks begin to appear in the happiness that I thought would last forever.