Sasaki, a perverted employee who pretends to be serious in his third year at the company, is secretly looking at pictures of girls' anuses he found online on his smartphone during his break when his boss suddenly shows up and exposes his sexual preferences. After being exposed on the company chat and treated like a pervert, Sasaki's girlfriend dumps him, and he decides to take out his pent-up anger on his boss' wife, Jun. Sasaki is mesmerized by Jun's beautiful anus, which is in proportion to her beautiful face, and he worships her beautiful anus in a daze while having raw sex with her over and over again...