다음 중:Yumi, a mother who lives with her husband and son Seiya, has a secret. She loves her only son, Seiya, so much that he secretly performs sexual acts on her husband, wanting to get rid of her worldly desires. However, her obscene actions, which she thought were good for her mother, eventually greatly expanded her sons hidden desires. Seiya started wanting to have sex with his mother and could no longer suppress his desire. When Yumi reflects on her own actions, she is unable to resist Seiyas demands and finally crosses the line that is forbidden to her...