Yui is an elite employee who works in the product development department at the head office. She visited a production factory to inspect the development of a new product, but due to one worker's plan, she was unable to refuse and accepted a sexual act on the bus. The rumor quickly spreads to the workers in the factory, and Yui begins to play sexual pranks on her. Yui has a serious and calm personality, but she cannot refuse strongly and she is attracted to men.