Nana, an office lady who has been with the company for three years, possesses a mature and stable personality. However, her work is not going well, and she is frequently bullied by her gloomy boss, Katsuta, in an unreasonable manner. Nana has no memory of being treated gently by men at the company, but she gradually begins to trust her boss Mayama's gentle words, and at some point, she begins to seduce Mayama...