Beelzebub: Hirotta Akachan wa Daimaou!?

Tatsumi Oga is already feared as one of Ishiyama High's toughest delinquents, but his newest problem cannot be solved with a fist. A strange baby named Beel has attached himself to Oga, and the maid Hilda reveals that the child is none other than the son of the Demon Lord, sent to be raised by the strongest human he can find.

Oga wants absolutely nothing to do with raising a future destroyer of humanity. His solution is simple: find someone even stronger and make Baby Beel choose a new parent. That search points him toward Ishiyama's four most powerful fighters, the Tohoshinki, turning childcare into a chain of brawls as Oga tries to dump his impossible responsibility on someone else.