FBOS-009 On a stormy night, Yuuri Oshikawa is alone with her female boss, trapped in the office.

Yuuri has a reputation within the company for being strict in giving guidance to her subordinates. Lately, they've let new employees quit. Yuri was called by the manager and lectured. He says he will submit the daily report of the new employee who quit. In order to prevent this, Yuri seduced the manager and had sex with him. At that time, a subordinate happened to come back to the office and took a photo of him. One day, Yuuri and his subordinate were riding an elevator when it stopped midway. Taking this as an opportunity, the subordinate shows Yuuri the video he shot and makes Yuuri give him a blowjob, but...