Office lady and young wife Kaya Ma Mio works at a company run by her husband's older brother. She continues an affair with her brother-in-law, who teases her with a remote-controlled vibrator while she's working in the office. In the president's room, she's forced to perform blowjobs and swallows his creampie. When her brother-in-law visits her home, he takes advantage of her husband's absence to train her like a female dog, making her crawl on all fours to instill deep humiliation, intensifying her pleasure with vibrators and electric massagers. Once obedient, Mio willingly grinds her hips and enjoys incestuous sex. However, the affair ends abruptly when the company suddenly goes bankrupt. Through creampie sex with her husband, their love deepens, leading them to build a new relationship.