기타가와 레이코 - 남편에게 이 사실을 말할 수 없어. 나는 이 비밀을 내 무덤으로 옮길 것이다. 1부

Her mother, who lives apart from her husband on a single assignment, is completely estranged from him and seems to be having a hard time with her sexual desire these days. However, she has no intention of cheating on her husband, so she seems to be indulging in masturbation by herself. The only one who could pleasure her mother's body was her son, who is forty years old and still in the throes of womanhood and fucking! A degrading sexual intercourse filled with immorality! They fall into a forbidden physical relationship!