Chitose lives with her much older husband and has just moved into a new apartment, where she becomes aware of her neighbor, Toyokawa. She knows he is a well-known adult film actor, and this knowledge sparks a strange mix of curiosity and anxiety within her. Observing her inner turmoil, Toyokawa takes advantage of her husband's absence and forcibly ties her up during the day, initiating a sexual relationship. This experience awakens Chitose's latent masochistic desires, pulling her into a whirlwind of new emotions starkly contrasting her mundane married life.