As Miss Beelzebub Likes

As Miss Beelzebub Likes (ベルゼブブ嬢のお気に召すまま., Beelzebub-jou no Okinimesu mama.) is a manga by Matoba. It began its serialization in the Shounen Gangan manga magazine in July 2015. Yen Press has licensed it for English release.

Plot
Murin lands his dream job with the demon king he's always held in awe, but when his tenure begins, it turns out the demon king isn't quite what he expected...