Yuna and Mizuki are close mom friends. One day, when she was having her usual tea party, the topic turned to her sex life. Young Mizuki seems to be having fulfilling sex with a young man she met on an app... Yuna refuses to use the app, saying she doesn't want to commit an affair, but she is swayed by Mizuki's momentum and starts using the app, thinking it's just for once... Yuzuru, whom I met through an app, is obedient and obedient. Yuna awakens to the pleasure of being in control, something she cannot experience in her boring life as a housewife, and drowns her mind and body in the matching swamp.