MRSS-187 Akane Rei, a clumsy married new employee whose only redeeming feature is her butt in a tight skirt, enjoys a sex marathon in the office during overtime, cumming all over her big ass and cumming inside her.

Fujita, who works for a black company, is constantly being yelled at by his boss, Sasaki, for unreasonable reasons. The main reason is Akane, a new employee who was assigned to the same department this term. She's charming and has a great butt, but she's completely useless at her job. Fujita, who is in charge of training Akane, is f** to take the blame for all of her mistakes, and his frustration is building up. One day, the two of them end up working overtime alone, and Fujita's stress explodes. And then, Fujita attacks Akane's butt.