BEELZEBUB

Oga Tatsumi is a crazy-strong, ruthless high school delinquent who's nicknamed the "Rampaging Ogre". One day, while dunking some punk, he rescues a big guy who comes ~floating~ down the river. When he does, the big guy splits in half and out pops a bouncing baby boy! But this baby is actually Kaiser de Emperana Beelzebub IV (Baby Beel), the son of the Great Demon Lord, and he came from the De...

Oga has been chosen to be the parent of Beelzebub, the son of the Great Demon Lord. However Oga's suffering since every time Baby Beel cries he lets out a severe electric shock. Plus, according to Baby Beel's demon maidservant Hildegarde (Hilda), if Baby Beel moves farther than 15 meters away from his human parent Oga, the electric shock will reach lethal levels. Oga shuffles to school with B...

Oga loses the powdered milk that Hilda prepared for him, and instead buys a bunch of "Yogurty" from a vending machine for Beel. But it turns out that's the favorite drink of one of Ishiyama's Big Four, the "Ishiyama Tohoshinki"; the third year Kanzaki Hajime. Oga hears about how horrible and ruthless a guy Kanzaki is, and runs into the third year classroom to try and dump Baby Beel off on him...

When Oga wakes up one morning, he's floating in a great pool of water... However it is actually Baby Beel's pee, as it is "urination season" right now in the Demon World. Oga is concerned about the entire city being inundated and humanity's imminent destruction, so he takes Baby Beel to the drug store to buy some disposable diapers. While he's there, a bunch of bank robbers a take Oga, Baby B...

On the back of Oga's fist a mark appears that is proof of his contract with the son of the Demon Lord, Beelzebub... The Zebul Spell. After hearing that the demonic power grows as well as the Zebul Spell the more he gets into fights and runs wild, Oga decides not to fight anymore to avoid that situation. However, Himekawa Tatsuya, heir to the Himekawa Zaibatsu and one of Ishiyama's TKKH like K...

A - Hilda brought back a bunch of toys from the Demon World for Baby Beel. When Oga and Hilda were assemble one, a horrible accident occurs! B - The Zebul Spell expands when one does evil. So won't it contract if you act like an angel? ...thinks Oga, who uses a Play Doctor toy with Beel as the doctor to try and heal patients. It's time to play Demon World Doctor!