Yondemasuyo, Azazel-san. OVA

Also known as:  You're Being Summoned, Azazel-san OVA

The story of Yondemasuyo, Azazel-san. - originally a supernatural gag comedy manga authored by Yasuhisa Kubo - revolves around the detective Akutabe, his assistant Rinko Sakuma, and the various magical demons that Akutaba uses for his cases - including the titular Azazel. The OVA version is adapted by Production I.G, and it's being bundled with limited edition volumes of the manga.

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Producers, official website and other details: AniDB, ANN, Wiki