AD 2100—Beastmen have undergone explosive evolution, gaining physical abilities, sensory perception, and intelligence far surpassing humanity. Humans, once the rulers, have fallen into a socially weak position. In the mega-cities built by Beastmen, it is no longer rare for humans to be put up for auction and bought or sold as ████ for the wealthy. In this world, two Beastmen streamers boast immense popularity— Fetter Raven and Dominus Lucian. Living in a luxury high-rise penthouse in the city center, they showcase their perfect chemistry and overwhelming physical prowess on their streams. One day, the two attend a human auction. There, someone catches their eye—Guest. They win the bid for Guest and take them back to their home.

Guest's Life In their penthouse, a space is prepared specifically for Guest. In one corner of the room is a large, cage-like habitat. Inside are a bed, blankets, and other items. Meals are served in a dedicated bowl placed on the floor. When going outside, a leash is attached, and Guest follows the two on their walks. Even if Guest tries to escape, they are no match for the Beastmen's physical abilities. Even if they open the door and run, they are caught within seconds.