An ordinary human boy, Iruma Suzuki, is bought by a demon and instantly becomes the demon Sullivan's grandson. He enrolls at Babyls Demon School, where friendly chaos and perilous pranks await. To survive and protect his humanity, Iruma must rely on kindness, wit, and unlikely friendships in a world ruled by magic and manners.

An ordinary human boy, Iruma Suzuki, is bought by a demon and instantly becomes the demon Sullivan's grandson. He enrolls at Babyls Demon School, where friendly chaos and perilous pranks await. To survive and protect his humanity, Iruma must rely on kindness, wit, and unlikely friendships in a world ruled by magic and manners.