Главный герой, страшный и сильный хулиган по имени Ога, однажды видит мужчину, тонущего в реке, и, недолго думая, спасает его. Но тут происходит странная вещь: мужчина распадается надвое, а внутри него оказывается ребенок. Ога, беспредельно добрый, хотя и суровый на вид, конечно, берет ребенка с собой. Впоследствии оказывается, что мальчик – порождение дьявола. И Огу теперь, как ни крути, его приемный отец и обязан его защищать и правильно воспитывать. Помогает ему в этом дивная красотка.© Hollow, World Art Эпизоды:01.  I picked up The Devil King02. Episode 2  03. Are There Any Strong, Ruthless Bastards Around Here?04. There is 1 Second Before the Demon Lord`s Floods Burst Forth05. There`s Nothing You Can`t Buy With Money06. Toys Have Arrived from the Demon World / We Played Doctor07. The Demon Lord makes his Debut at the Park08. Also Met09. Love is a Hurricane10. A Disciple Was Gained11. There Was Something Money Couldn`t Buy12. I Won`t Let You Sleep Tonight  13. Baby Beel`s Assessment Test / Hilda: Dear Great Demon Lord14. Is There a Special Move?15. The Delinquents have Changed into Swimsuits16. You`re Not a Bad Specimen of a Man17  How About Some Demon World Homework?  18  I`ve Quit Being the BoB Brawler!...19. The Doctor Has Arrived20. Everyone Assemble21. Who Do You Think Is Ishiyama`s Strongest?22. Secluded Mountain Training23. You Kidding Me? The Demon World24. Welcome Back, Demon World! 25. The New Term Has Started!26. May I Call You Brother?27. Called a Magical Girl!  28. Let`s All Get Physicals!  29. What Are the 6 Holy Knights?30. Who Are the 6 Holy Knights?  31. No Conclusion Was Reached!32. What Has the Transfer Girl Done?  33. There Are Wounds in the Past  34. Maids Run Amok  35. Time for the Game to Begin!  36. Finally, the Deciding Battle!37. That Man was a Teacher!38. The Sibling Rivalry Has Begun  39. His Brother was a Crybaby!  40. No Shoes, No Shirt, No Assassins  41. On the Brink! What`ll We Do?!  42. It`s Time for Training!  43. Where Might My Brother Have Disappeared to?  44. I Must Become Stronger45. Play Games at Most One Hour a Day!46. Super Burning Combination!  47. Sorry to Have Kept You Waiting48. I`m His Parent  49. Beelzebub`s New Year`s Special! Beelbeel Journey to the West!  50. Today I`m Different on the Inside51. Komainu-sama is Watching You  52. And Then There Were No Delinquents53. Baby Beel`s First School Uniform / Furuichi Falls in Love  54. Black Baby Beel Grows Up!55. I Have Lost My Pompadour / The Great Demon Lord Has Come  56. Are You a Traitor? / Is This a Job for Men...57. Won`t You Eat a Manju? / Won`t You Get in a Mixed Bath?58. Akumano Academy is Open59. We`re the Strongest60. I Won't Say Goodbye