There were no demons in this world to begin with. Where did they come from? Only those acknowledged by the Demon King can become demons.
In the Demon Realm, there is a fairy academy that has made the dreams of many animals and plants come true. Under the new Demon King's leadership, which new students will become demons?
What? A fish afraid of water, a gossipy bird, a cat that can't do anything... Good heavens, even a shopping bag is going to become a demon!
