Yui is an elite employee who works in the product development department at the head office.She visited a production factory for the development of a new product, but due to the scheme of a certain worker, she could not refuse and accepted the lewd act inside the bus.The rumor quickly spreads to the workers in the factory, and her sexual mischief to Yui begins.Yui, who has a serious and quiet personality, accepted the men's requests without being able to refuse them strongly, and on the last day of her inspection, a rough farewell by the group was waiting.