The premise follows human boy Iruma Suzuki after his adoption by demon Sullivan and enrollment at Babyls demon school, where he conceals his humanity. All 23 episodes center on school ranks, familiar summoning, flying races, execution cannonball matches, battler clubs, and a fireworks climax tied to rival Kiriwo's demon-world grudge, resolved through ordinary friendship with classmates such as Asmodeus Alice and Valac Clara plus student council president Ameri. The narrative stays anchored in classic underdog competition and adventure tropes rather than any social justice framing.

No episodes introduce systemic oppression narratives, identity politics, or critiques of traditional norms. Characters like Ameri and Clara integrate organically into the story through their roles in rank competitions and group activities, without foregrounded identity traits or messaging. This approach keeps the focus squarely on entertainment and world-building in a demon-school setting.