Matsunaga-san is an office worker who is quiet and diligently working at her desk in the corner of the company. She has plain black hair, black-rimmed glasses, and a quiet and gentle personality, but she can't say no when the male employees give her a huge amount of work, and she accepts it with a smile... None of the men in this company knew the true identity of this gloomy female employee, who is likely to be found at least one in every company. "Huh? Now that I look closely, isn't Matsunaga-san's breasts unexpectedly large (lol)?" A casual comment from a male employee teasing her for not being seen as a woman in the company opens the door to an erotic dream that no one could have predicted...