Okamoto-san is a new employee who has just finished her training after joining the company. She's diligent, but she doesn't like being in front of people and made many mistakes during her sales training, so she hopes to be placed in the administrative department. Her boss hears this and encourages her to join his department, which she accepts. Then, while she's being explained and signing some paperwork, she suddenly becomes sleepy and passes out... When Okamoto wakes up, she finds her boss performing a cunnilingus on her between the legs! In fact, she signed a contract agreeing to become a "sex contract employee," fulfilling her boss's sexual desires as instructed! Her H-cup breasts, visible even through her suit, are fondled, and a penis is pressed against her nipples! Of course, she's filmed having sex without permission and creampied! After a thorough training session, she's asked to entertain a client's representative...! The contract cannot be broken; it's a binding agreement!