Hoshino is an ordinary office worker with glasses and long fringe. One day, while working overtime, she has a physical relationship with a playboy coworker she has a crush on. Hoshino is too shy to even show her naked body, but after one encounter with him, she's changed forever! Using techniques learned from the erotic comics she reads regularly, she attacks her coworker, leaving him vulnerable. The roles are switched and the relationship between the two continues to play out in the office.