Beelzebub: Hirotta Akachan wa Daimaou!?

Delinquents at Ishiyama High School either fear Tatsumi Oga or hope to defeat him; but instead finds himself preoccupied by other matters--like taking care of baby Kaiser de Emperana "Beel" Beelzebub IV, son of Demon Lord.

Hildegard "Hilda," Baby Beel's maid informs Oga that Baby Beel has taken an instantaneous liking to him due to Oga's immense strength, latching onto him due to their mutual strength. Either Oga must take responsibility and raise Demon Lord's son or face Hilda's blade! If Oga cannot find someone stronger to appeal to Beel he should convince one of Ishiyama High's Tohoshinki of four strongest fighters of Tohoshinki of four strongest fighters of Ishiyama High to take over his care?