DVD Extra Short Anime of Beelzebub

Acccording to the Beelzebub official website, the first DVD was announced to be released in Japan on April 20, 2011. The DVD will include a short anime ‘"Hashire! Beru-bo Keiji!! (Run! Detective Beel-bo!!)", the first two episodes of the Beelzebub anime, and a card deco sticker.

Source: Beelzebub’s website

Beelzebub: Hashire! Beel-bo Keiji!! on MAL