While my girlfriend was away for 12 hours, I had French kissing and creampie sex with my girlfriend's sister, the No. 1 hostess with monthly sales of over 50 million yen in Hoplayve. Ranran Fujii

The movie revolves around the scenario where the protagonist, Kuroi, engages in intimate activities with his girlfriend's sister while his girlfriend is away. The relationship between the main participants is complex, with Kuroi being drawn to Miyu's sister despite being in a relationship with Miyu. The central dramatic tension arises from the secrecy and potential consequences of their actions, as well as the exploration of desire and intimacy.