Mio Hamura, who works at an advertising design company, has a secret crush on her business partner Kamiya.
However, by chance, Mio found herself in a physical altercation with Nagase, an attractive, self-possessed man who was once her classmate.
Nagase would casually visit Mio's room, and Mio could not resist the pleasure Nagase brought to her, and the two had a secret relationship...
Then, Kamiya, whom Mio admires, invites her out for a drink.
This is an office love story for mature adults that is pure despite its calculating nature!