A useless, middle-aged new employee whose only redeeming quality is her buttocks clad in a tight skirt, is subjected to a passionate, intense sexual encounter in a quiet office where only the two of them are present. The encounter involves her ejaculating and cumming inside her. (Ciri MRSS-187)

Fujita, who works for a ruthless company, is frequently scolded by his boss, Sasaki, for various unreasonable reasons. The main reason is Akane, a new employee assigned to the same department this term. While Akane is exceptionally cute and has a terrible butt, her work ability is completely lacking. As Akane's mentor, Fujita bears the brunt of all her mistakes, accumulating a lot of frustration. Until one day, while the two are working overtime alone, Fujita's pressure finally explodes, and he launches a fierce attack on Akane's buttocks.