Kurosaki is a capable female boss who looks like a dark gal, while Hayashi is a useless subordinate. Hayashi makes a lot of mistakes, and while she helps him out, he secretly has feelings for her. One night, Kurosaki gets drunk and changes completely, and ends up having a relationship with Hayashi. However, when Kurosaki says she has no memory of their first night, Hayashi is confused, but their relationship deepens. At the office, the seemingly cool boss and innocent subordinate develop a passionate relationship at night. A secret relationship between these two, whose appearances and personalities are a stark contrast, begins.