Sumire was a housewife who had quit her job to get married after an office romance. Her co-worker, Hisashi, came over to her house and they started drinking. Hisashi had always had feelings for Sumire, but he was still bitter about her being stolen away by Kenichi. One day, Hisashi found out about Kenichi's cheating and threatened him with it in order to make Sumire his woman.