Yui Sayama, who joined a certain construction company, is a rude and unfriendly NEET woman who doesn't apologize even when she makes mistakes at work. Although her body is well-developed and warm, her boss, who was troubled by dealing with Sayama's bad attitude, became lustful for her large, firm breasts and buttocks that peeked out from her work clothes, and while pretending to guide her, he sexually harassed her by rubbing her breasts. Sayama, who has no social experience and is naive and ignorant, doesn't know what to do and ends up accepting the sexual harassment without being able to refuse strongly, and gradually her body begins to seek pleasure. Eventually, she becomes a convenient flesh masturbator who is creampied by her boss whenever he wants during work, and a newcomer training begins where she is taught the harshness of society with his dick…