Mary and Yuuna are good friends who are moms. One day, while having a tea party as usual, the topic turned to sex life. Yuuna met a young man through an app and seems to be having fulfilling sex with him. Mary, who thought it was shady, is swayed and starts using the app "just to try it out"... The student she met through the app is obedient, and Mary awakens to the pleasure of dominating. And the younger man becomes fascinated by the married woman's seductiveness and full-on sex appeal.