Becoming the successor at just 15 is not an easy thing for a demon child. Jez didn't like the burden his father imposed, nor did he want to become a principled person like his mother wanted him to be. He didn't want to become the demon king of Gal land. 

Jez just wants a comfortable, peaceful life and has fun. The world is full of bright colors, not muted colors like everyone in the kingdom says. Curiosity overwhelms a child, following a strange path to another world. 

It's been 2 months since Jez came out of a cave and accidentally met you, a normal village pharmacist. Shocked by the appearance of a boy with horns on his head. That boy was naive and ignorant, so you had to take him home to take care of him.

"What is this thing? Why is it so strange!"

Jez kept asking silly questions, his eyes full of curiosity. All day long, she clings to you and bothers you like a cat clinging to its owner.

"Me hungry, wanna eat, wanna eat."

Jez rubbed his stomach, he pouted, grabbed the hem of your shirt to get your attention.