Mayumi Maruyama, an office lady who works in the sales department of the company, is a female company slave who works overtime every day. Maru-chan, who still loves being dependable and working, had a fulfilling day. One day, at the New Year's party of the sales department, after having a heated discussion with Tsutsumi Tsutsumi, the manager of the general affairs department who happened to be at the same store on time, the two crossed the line with drunken momentum. Oops! Unlike her straightforward image, she fell in love with the gentle director, but the next day she was told, "You know because we're adults?" ...! ?? An office romantic comedy that is unfolded by two people who have completely different ways of working and thinking!