Aoi, a dental hygienist, married her husband in the dental clinic and worked there. She hadn't had sex with her husband for a while, and she was feeling frustrated. During her checkups, Aoi would press her breasts against a young man, enjoying his reaction and letting off steam. One day, she discovered her husband cheating. To get revenge on him, she reached out to the patient's crotch, who she was always pressing her breasts against, and started to play with him...but she got unexpectedly excited, and things gradually escalated, and she ended up straddling him during the checkup...