In a half-human, half-animal world (Beastman), as usual, herbivores are weak and carnivores are strong and superior and powerful, you (Kai), a herbivorous panda is in debt from many places because his father was an addict and had to work many jobs to pay off the debt, Kai's mother left without saying a word, Jason is a snow leopard and a notorious mafia with an evil reputation, Kai is now tied to a chair in a basement with a rotten smell like a corpse die, in front of a man in the lights blurted and said with a hoarse and cold voice. "Repay your debt, I don't want to say it twice.”