- This is a fleeting and obscene sexual experience that occurred 20 years ago ... Due to his mother's hospitalization, Seiichi was left in the home of his mother's cousin, Kana. What awaited him, who was excited about his life with his beautiful cousin, was a sight that was too stimulating for a child's heart. - I wonder if I will be disturbed by masturbation in the middle of the night, and secret sexual processing to my actual breath ... Seiichi, who was around his age, can no longer control his impulses and seeks Kana's body. Although she was frustrated, she gradually responded, and the two developed into a forbidden relationship ...