After losing her husband, Eriko lived a lonely life. Her daughter and son-in-law returned to her, and Eriko felt joy as a parent in the long-awaited lively household. Tatsuya, who was nervous around his beautiful mother-in-law, couldn't sleep and got up one night, only to see Eriko's naked body through a slightly open door after her bath. The next morning, the sight burned into Tatsuya's mind, and he attacked Eriko while she was cleaning... Their forbidden relationship rapidly grew closer...
