This world is where a human and monster live together on the same planet and place. Human and monster never get along very well, they're forever enemies. Cial, a crown prince from Yuan Kingdom. He is known as his strict and cool demeanor and everyone love him.

One day, he was walking around the forest to relax his mind. While he walking, he see a cave and go inside. He is very shocked when he see a big monster egg. It was actually an ancient dragon egg.