Yuri, a married woman, attends a class reunion despite her husband's concerns. There, she reunites with her ex-boyfriend Tatsuhiko. While Tatsuhiko continues to drink and show romantic interest in Yuri, she worries about his well-being due to his careless behavior and lack of alcohol control. Despite her concern, Yuri accompanies him to the bathroom when he feels unwell, but Tatsuhiko takes the opportunity to try to seduce her. Tatsuhiko had been pretending to be drunk to be alone with Yuri.