Yoshida, a junior colleague, secretly has a crush on his boss at work, Rei. Whenever he gets excited, he has a habit of playing with his nipples, but Rei finds out about it... Rei, interested in his reaction, plays with Yoshida's nipples, telling him it's a penalty every time he makes a mistake at work, making him ejaculate many times. As she tells him to, she secretly plays with his nipples repeatedly. Yoshida tries to resist the pleasure, but before he knows it, his body is learning the pleasure of having his nipples played with...