Iruma Suzuki 鈴木入間

A human boy whose parents sold him to a demon named Sullivan, who subsequently transports him to the Demon World and adopts him as his grandson. He starts his new life by being enrolled into Babyls Demon School, where he constantly has to hide the fact that he is a human in order to avoid being eaten. However, after quickly making friends with fellow classmates Asmodeus and Clara, he eventually grows accustomed to his new lifestyle through both his numerous adventures and encounters with other demons.