Rin, a new office lady, finally got a job and on her first day at work, is shocked by her senior Miyuki. The job is to be a "sexual desire relief officer," but before she can understand the situation, Miyuki's practical training begins. Suddenly, a male employee comes into the department, rubs Miyuki's breasts, gives her a titjob, and leaves. The department she's assigned to is in charge of sexual welfare for male employees. The male employee's thick semen is splattered all over her J-cup breasts!