Reiko, a strict mother, has been raising her son Ryota with the utmost care, wanting him to be a success like her husband. However, Ryota is not doing well, and she has not had sex with her husband for a long time, so her stress and sexual desire are building up. One day, when she secretly reads a porn magazine in Ryota's room, her suppressed sexual desire explodes... Ryota's best friend Atsushi happens to be there and sees her indecent behavior. Reiko, who has lost control and is rebellious against her past behavior, does not scold him, but instead plays with his dick as her instincts dictate...