Beelzebub

Ishiyama High is a school full of delinquents, where chaos and fights are everyday life. But even in this lawless place, everyone knows one rule-never mess with Tatsumi Oga, the toughest first-year student around. One day, while Oga is hanging out by the river, he spots a man drifting downstream. When Oga pulls him out, the man splits open-and inside is a baby. The child immediately clings to Oga and won’t let go. Unbeknownst to Oga, this baby is Kaiser de Emperana Beelzebub IV, or "Baby Beel," the son of the Demon King. Things get even stranger when Hildegard, Beel’s demon maid, shows up. Now Oga and Hildegard are stuck raising Baby Beel, but between rowdy delinquents and supernatural mischief, they might be in way over their heads.