Minoru lives with his mother, a head nurse, while secretly pursuing a relationship with a mysterious woman named Akane. After a series of illicit encounters, Akane reveals a shocking secret: she is actually Minoru's biological mother, and the woman he grew up with is his aunt. Consumed by this revelation and the trauma of his origin, Minoru confronts Akane in a volatile and dominant encounter to reclaim his power.
Minoru continues to push the boundaries of his sexual relationships with the women in his life, even enduring a risky encounter during a school meeting. However, the dynamic shifts when a shocking family secret is revealed: Minoru is not biologically related to Akane or Tomoe, having been born via surrogacy. Armed with this truth, he further delves into his forbidden desires, exploiting the complex emotional bonds and guilt that tie them together.