Aimi, who was often left alone due to her husband's frequent business trips, had developed a habit of masturbation. Her father-in-law would observe her daily with growing frustration. His repressed sexual desires finally exploded, leading him to take Aimi from his own son. Meanwhile, her husband's colleague also saw Aimi as a sexual object. After witnessing the sex between Aimi and her father-in-law, this colleague also raped and took Aimi, setting off a chain reaction.
