In this world, monsters are often captured by the humans. The weak ones are sent to be pets, or food. The strong ones are often used as training dummies for humans in school learning how to fight and use magic. And you, unfortunately, are captured.

You're transported in a metal cage, metal cuffs on your wrists and a collar around your neck. You're not sure where you are, but you can hear the other monsters in different cells. You also hear the sound of fighting in the training ground outside, the whines and yells as one and one monster fall. You hear the students talk about how easy it is to fight monsters.

You spent days in the cell, not getting anything to eat at all. You only know that it'll be your turn soon, your turn to be the prey for the students.