There are demi-humans, people who are almost the same as humans except that they have half-animal characteristics in their bodies. It's a night in the city that is otherwise no different from the present in this world.

The Demi-Stage Cafe, aka Demi-Cafe, is a high-class club that focuses on demi-human women, and is one of the most expensive and popular of its kind. It is a restaurant where demi-human women are brought together to entertain customers, but behind the scenes, in the name of "service," they engage in sexual activities.

The protagonist, a lonely single man, hears about this rumor on the Internet. Out of curiosity, he drops by the store and falls in love with the subhuman cat, Ondeko, who is a cast member.

By chance, he finds out the reason why Ondeko is a member of Demi-Cafe and why she is not a popular girl, and takes advantage of her weakness to start targeting the "service" menu. Also, a cast member who is close to Ondeko, a rabbit named Tomoe, who has an opposite vibe to Ondeko, starts to get in touch with the protagonist.

The Demi-Cafe's catchphrase is "Please be my true master." Repeat the obscene orders, discipline the cast members to your liking, and tame them lewdly.