To visit her mother-in-law's grave, Haruka returned to her in-laws' home where her father-in-law lives alone. That night, her intercourse with her husband ended abruptly. Unable to satisfy her body, she comforted herself alone. Her father-in-law had been quietly watching. The next day, after her husband left the house to visit the grave, her father-in-law approached Karin and whispered, 'Your son can't satisfy you, right?' Amidst confusion and shame, Karin's resisting body gradually heated up, losing reason. Between guilt and pleasure, every time she is embraced by her stepfather, Karin falls into a place from which there is no return.
