Another man's wife, Honey & Meat.

Takamura is invited to a fitness club by the wife of the managing director at her husband’s job. She goes and moves around her body. Just when she thinks she’s done, the wife says that things are just getting started. Onda is told by his upperclassmen about this part-time job so he goes to check it out. He goes for an interview, and then is told about the “special menu” the shop offers, which he decides to try out.