Two siblings have been constantly fighting, but their lives take an unexpected turn when they realize they are sexually attracted to each other.

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.

Sakurai Taichi, facing a financial crunch, lands a job as an assistant on a film shoot where he reunites with his schoolmate and the most beautiful girl in school, Himawari Kanan. To his surprise, the shoot turns out to be for an adult video, which initially shocks Taichi, who tries to decline the offer. However, Kanan accepts the role, claiming it will be an educational experience. Despite feeling uncomfortable with Kanan's bold actions, Taichi finds enjoyment in working alongside her. During the shoot, the lead actor has an accident, and Taichi steps in to replace him, which leads Kanan to also participate in the video. (Source: TMDB)