MIRAI has been constantly fighting with her husband due to his infidelity, leaving the couple abstinent lately. In this situation, she receives sexual instruction from an experienced man. A former high school gymnast, she's made to perform a bridge position while giving a blowjob, repeatedly introduced to the intense sensations of vibrator play, and brought to climax with skilled fingering. As she sees her own image on camera, the young wife gradually gives in to her erotic impulses and responds passionately.