This is a fleeting and obscene sexual experience that happened 20 years ago... Due to her mother's hospitalization, Seiichi was entrusted to the family of her mother's cousin, Kana. What awaited him, who was excited about life with his beautiful cousin, was a scene too stimulating for his childish mind. I wonder if I'll be disturbed by masturbation in the middle of the night, and secret sexual processing for my real son... Seiichi, who was about the age, can no longer control his impulses and seeks Kana's body. Gradually responding to her frustration, the two developed into a forbidden relationship.
