Mairimashita! Iruma-kun #1

The story follows the life of Iruma Suzuki, a 14-year-old human boy, who is sold to a demon by his parents. The demon is known as Sullivan, who takes Iruma to the Demon World and officially adopts him as his grandson. He then enrolls Iruma in the Babyls School for Demons where Sullivan 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 a human, since he will be eaten if anyone finds out that he is not a demon. Iruma then vows to blend in during his time in the Demon World, although he only stands out due to all the situations and adventures that arise.

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