Waka Misono - Workers in the Next Room... Can They Hear Us?! : Part.3
A husband and wife who run a company invite the company's employees to their house. The reason for this is to secretly make out with them in such and such a way that the employees don't find out. The husband and wife, who have been in a rut with their nightly activities, find this thrill unbearably exciting, and their activities escalate. Finally, at the husband's behest, the wife bursts into the employee's bathing room completely naked...