Un Istituto con un tasso di delinquenza al 120% Un giovane uomo, un tipo baffuto, una cavalletta. Ma soprattutto: chi è quello strano moccioso che terrorizza gli studenti?

Per Oga le distanze sono importanti: allontanarsi per più di 15 metri da Beel vuol dire pericolo assicurato.

Oga è sempre alla ricerca di qualcuno che possa prendersi cura di Baby Beel al suo posto. La 3A sembra il posto adatto...per portare fuori la spazzatura.

La minzione di Baby Bell rischia di allagare il Giappone. Occorrono "magici pannolini" e delle schegge di vetro, per i peli superlui.

Oga ha promesso che non si batterà mai più e le promesse tra uomini vanno mantenute! Tutto ha un prezzo, basta avere la grana... Quanto vuoi?

Baby Bell vuol giocare al dottore! Legger..., ahem, ascoltare attentamente le istruzioni e le modalità d'uso.

Baby Bell si presenta alla comunità del parco, fondamentale per la sua crescita. Muoversi, che alle 13.00 inizia la soap opera.

Chi meglio di una "Regina", per fare da mamma a Baby Bell? Ma come in ogni favola che si rispetti, 2 regine sono di troppo. "Specchio, specchio delle mie brame..."

La Regina è caduta nella trappola degli MK5 ed ora è sul tetto della scuola, dove si scontrerà con Oga. Nel mentre Baby Bell: "Colpo della Divina scuola di Okuto", miao.

È tempo che Baby Bell faccia nuove amicizie, oltre che a un nuovo discepolo. Il "Tabasco" è il sale della vita, quando la scintilla scocca.

Himekawa lives by the motto, "there's nothing that money can't control." In order to get revenge on Oga, he uses the power of money to work behind the scenes in plan after plan to defeat him, but Oga keeps getting the upper hand.

Oga's family is seriously worried about Baby Beel's night crying. They try all kinds of things but nothing works. Oga heads to school, completely exhausted, as do the other students looking for a fight.

It's the Ability Assessment tests for Ishiyama High, the den of delinquents. Baby Beel and Hilda have gotten used to various customs in the Human World and report on Baby Beel's growth to the Great Demon Lord.

Kanzaki is thinking hard about why he's unable to be a match for Oga, and tries to perfect a new special move, when Shiroyama realizes the crucial difference: Oga has a baby on his back. Shiroyama and Natsume help Kanzaki go through intense "BoB" training.

Oga hears about the legendary Tojo.

Furuichi is called back from a resort on a tropical island where he was vacationing with his family to go to the public pool with Oga. At the pool, Furuichi runs into a nasty upperclassmen he knew from middle school, and it's not just him, but Nene and the other Red Tails that are in trouble.

The Great Demon Lord decides to send Baby Beel some summer homework on a whim. The gang helps Baby Beel do the homework as best they can, but if they mess up how to use the items in the kit, all of humanity is doomed.

Baby Beel comes down with a fever, and Oga's link to him and his never-ending shocking comes to an end. Hilda and Baby Beel disappear, and when Oga goes looking for them he finds Baby Beel stuck on Tojo's back.

With a single blow from Tojo, Oga learns the difference in their strength and dejectedly returns home. Waiting for him are a former court physician and his assistant from the Demon World. Oga is thrown into his own mysterious mental subconscious in order to grow as the parent of a Demon Lord.

Oga is all raring to go finally beat Tojo this time, and Kanzaki and Himekawa try and join forces with him. Then, delinquents come to attack the three! Making it through the forces, Oga finally arrives for his showdown with Tojo.

The battle to decide Ishiyama's strongest has started. Oga has a tough time against Tojo's beastly strength, but while getting the snot beat out of him he puts his entire body into a single punch that sends Tojo flying back.

Baby Beel and Oga head deep into the mountains to help train Beel to get over his fear of bugs, where they run into Aoi and Kota. Aoi is nervous because it seems like a date, until her master martial artist grandpa shows up, takes the initiative and attacks Oga.

Their work done, Doctor Furcas and Lamia head back to the Demon World, but Oga, Beel, and Furuichi accidentally hitch along for the ride. With Alaindelon out of commission after exceeding his maximum interdimensional transfer weight limit, the gang has no choice but to search for his daughter.

In search of Alaindelon's daughter so they can get back home, Oga and the gang head to a city of criminal Demon Beast poachers to rescue her. But before they get the chance, a giant monster appears to take revenge on the poachers for the harm they've done to Vlad's Haunt.