The story follows the "strongest juvenile delinquent", Oga Tatsumi, a first year in "Ishiyama High" the school for delinquents. One day while sleeping next to a river he sees a man floating down it, he pulls him to shore and the man splits in half revealing a baby boy. This boy is the son of the demon king and he has been chosen as the one to raise it with the baby's demon maid Hilda. The story follows his life with the child and at the delinquent school.
Really this series is something. It starts of very original and fresh, but sadly becomes very very mainstream after a while. But the mangaka still manages to keep the badassness of this manga and thats what makes me say such a cruel thing. Fuck St&rs,enigma and the other new crappy shonen jump series. They all wetn horribly downhill so they should be cut imo. Also series like naruto and reborn should be cut too because they cant come up with original stuff anymore...but thats another story....