Matsumoto Kei works at a planning department in a company that runs fast-food business. One day, he was fell in love at first sight by an unexpected person, Iwakiri Shinji who's a manager of the most profitable shop. Since then, Iwakiri has started to make advances to Kei with all his might to the extent that it was like sexual harassment! Even though Kei tries to concentrate on his work to ignore Iwakiri, he was at the mercy of Iwakiri's fickle expression that goes from playfulness to seriousness...?!