This is a goofy detour where Beelzebub stops being a shounen action show and just lets Oga and Baby Beel solve mysteries like incompetent disaster twins. The comedy lands because it's grounded in how these two actually work together, not in random gags. You get three episodes of pure chaos investigation with zero stakes, and that's exactly what makes it work.
Oga Tatsumi finds himself dragged into the world of detective work when a mysterious case lands in his lap. With Baby Beel tagging along for the chaos, the delinquent duo stumbles through supernatural mysteries that would be serious if Oga had any actual investigative skills. The cases themselves range from the genuinely bizarre to the downright absurd, requiring less sherlock and more pure dumb luck to solve. What makes these specials work is how they lean into comedy over genuine mystery solving. Oga's aggressive approach clashes hilariously with the meticulous detective work the situation demands, while Beel contributes chaos in equal measure. The tone stays light and ridiculous throughout, never pretending these are actual whodunits worth puzzling over. These three episodes work best if you already know and love the main cast's dynamic. They're not expanding on anything crucial to the series, just spinning what-if scenarios with characters you already care about. Think of them as fan service wrapped in comedy and wrapped again in supernatural nonsense.