Welcome to Demon School! Iruma-kun [TV]

Iruma Suzuki is a 14-year-old human boy who is sold to a demon by his lazy, selfish and neglectful parents. The demon, known as Sullivan, takes Iruma to the Demon World and officially adopts him as his grandson. He enrolls Iruma in a School for Demons where he is the headmaster and where Iruma quickly befriends the demons Alice Asmodeus and Clara Valac. However, Sullivan tells Iruma to never reveal that he is human since he will be eaten if anyone finds out. Iruma then vows to blend in during his time in the demon world, although he only stands out because of all the situations and adventures that arise. By his second year Iruma turns 15 years old.