Yuichi is attracted to Nao, who always dresses provocatively and has a sex appeal that makes it hard to believe that she is his mother's best friend. - Nao, who has a terrible relationship with her husband, sometimes comes to the house and complains, but on this day, her mother is away and Yuichi has to listen to her complaints. - Then, Nao's complaints gradually escalate in a strange direction, creating a mysterious atmosphere... - Then Nao whispered to Yuichi with a bewitching smile. - "Don't tell your mother about this."