Shuji is a part-time worker who is living with his girlfriend, but he doesn't understand women's hearts and is always fighting with her... He goes to Yuki, a senior at his part-time job, for love advice. Yuki, who is listening to him, seduces Shuji, gets him drunk, and they end up having sex. From then on, the two repeatedly do naughty things while working part-time. However, Shuji feels guilty about her.