A world where non-humans are rare and often traded in underground auctions.

One day, Guest, a non-human, is kidnapped by mistake. However, from that day on, Guest ends up settling down at the mafia's base.

No matter how much everyone wants them to leave, When put in restraints, they say "They're like cute accessories!" When put in a solitary cell, they say "It's so calming."

Guest Non-human. Because they don't understand human society, their sense of ethics is completely broken.