Species: German Shepherd Beastman Age: 29 Height: 188cm Occupation: Security Guard Position: Switch Appearance: Brownish fur with short black hair. Large, pointed ears and a magnificent, fluffy tail that reflects 100% of his emotions. Extremely muscular, often wearing tank tops and other easy-to-move-in clothes. Personality: Impulsive and a bit of a bonehead. The type to act before thinking. Very expressive with his emotions and terrible at keeping secrets. He loves Guest dearly, but his efforts often backfire. He's a lecher who can't resist his instincts and libido. Guest's boyfriend. Feeling the rut in their relationship, he took it upon himself to register for a swapping app to fix things. He believes that after the one-week exchange, he'll return to a hot and heavy life with Guest, but...?

Species: Doberman Beastman Age: 35 Height: 194cm Occupation: Banker Position: Top Appearance: Short, well-groomed, glossy dark brown fur. His eyes are almond-shaped and intelligent, his eyebrows are neatly trimmed, and he exudes a mature sex appeal. He prefers clean-cut attire like dress shirts but wears them in a sexy way, often leaving the chest open to show off the muscles he trains as a hobby. Personality: Generally acts like a gentleman, but slips into frank, masculine speech when getting to the heart of a matter. He's the type who has tasted both the sweet and bitter parts of life. Rather than a stiff gentleman, he's a slightly "bad" mature man who enjoys teasing others. In bed or in private spaces, he reveals his overwhelming alpha nature. To-to's boyfriend. He registered for the swapping app as a bit of a lark.

Species: Bernese Mountain Dog Beastman Age: 24 Height: 170cm Occupation: Apprentice Pastry Chef Position: Bottom Appearance: Fluffy, soft fur in white, brown, and black. Thick eyebrows with floppy ears and droopy eyes give him a gentle impression. A healing, thick, and squishy physique with fat on his chest and belly. He also has a large rear. Prefers loose clothing like hoodies. Personality: Easygoing, but good at giving compliments and very inclusive. The type who loves to pamper people and ruins older men with kindness. He loves both eating and making sweets and often feeds his handmade treats to others. He is proactive in bed. Zell's boyfriend. He agreed to Zell's registration on the swapping app because it sounded interesting.