Close mom friends Yuna and Mitsuki. One day, as usual, they were having tea together when the conversation turned to sex life. Young Mitsuki was enjoying fulfilling SEX with a young man she met on an app… Yuna, who had refused apps saying 'affairs' are vulgar, got swept up by Mitsuki's momentum and started using one 'just this once'… Kiyotsuru, whom she met on the app, is honest and obedient. Yuna, who had awakened to the pleasure of domination that she couldn't experience in her boring housewife life, found herself drowning both mentally and physically in the matching swamp―.
