Beelzebub
Ishiyama High is a school where only bad kids go, and violence and breaking the law are the norm. But there is one rule that everyone agrees on: don't cross first-year student Tatsumi Oga, Ishiyama's most dangerous fighter. One day, Oga is by a riverbed when he comes across a man floating down the river. After Oga gets the man, he splits down the middle to reveal a baby. The baby crawls onto Oga's back and starts to like him right away. This baby's name is Kaiser de Emperana Beelzebub IV, or "Baby Beel" for short. He is the son of the Demon Lord, though he doesn't know it yet. As if finding the future Lord of the Underworld wasn't enough, Hildegard, Beel's demon maid, also shows up to talk to Oga. Together, they try to raise Baby Beel, but they are surrounded by young criminals and people with demonic powers, so it may be harder than they think.