I’m a Human, but, I Became the King of Monsters

The protagonist Chang Zaikun has been able to see terrifying “weird” creatures in his life since he was a child, but he was never afraid, but was deeply attracted by those monsters and fell in love with them from the bottom of his heart. One day in high school, he accidentally met a monster administrator and received an invitation: to manage a “prison” inhabited by a lot of monsters, and to find those monsters who were lost in the world!