Yuka, who made a mistake at work shortly after joining the company, receives an order to leave the company. After finally getting a job at the company, she accepts a transfer to an unfamiliar department called the "Sexual Desire Relief Department"... The female employees assigned to this department have to provide a shocking employee benefit of using their own bodies to relieve the stress and sexual desires of the male employees. As she is showered with thick, murky semen during her sexual labor, Yuka gradually awakens to the pleasure of being a human urinal...