Konno, an ordinary office worker, was neat and polite in her work, and was admired by her juniors at the company. However, she has a secret that she can't tell anyone... It means that she has her obsessive habit that she can't stop masturbating even at work. In order to vent her frustration, she uploads racy photos on her back account on SNS, and spends her days consoling herself in the company's restroom while thinking of Saeki-kun, her junior who has feelings for her. One day, she was called to the conference room by Saeki-kun and thought that she was consulting about her work, but she found out about her back dirt. Saeki threatens, "If you don't want to be taken apart... is that okay?" [Pink diary]