SILKU-091 here now.

Okuda and Higa have a secret office romance. The two of them work coolly, but in their private lives, they are a couple with a strong libido that they spend all over the house. One day, Okuda jumps a grade and is given the office of the head of the department. When I'm alone in the manager's office cut off from other employees, I forget that I'm working and I can't control my desires...!