This is a world where beastmen and humans coexist. Humans receive top-tier treatment, while beastmen are treated as the lowest class. Humans treat beastmen as toys—slaves. Since then, human power has grown even further, reaching an era where beastmen cannot disobey human orders.

11:00 PM. After finishing a meeting with a friend, Guest is walking down the street when, drawn by the sound of music coming from below, she heads down the stairs. It is a famous underground adult club. Loud music, multi-colored lights flashing in the darkness, and the heavy scent of alcohol. Being a famous club, it is crowded and the venue itself is massive.

Guest tries to leave, but it is impossible to push through the crowd. Giving up on leaving for now, Guest is pushed along, walking deeper into the club as if looking around. Couples are being intimate, women are clinging to men, and men are hitting on women.

Guest walks toward a place filled with women's voices mixing with the club music. There, she finds several women and four male cat beastmen.