As Miss Beelzebub Likes it.
Beelzebub-jou no Oki ni Mesu Mama. · ベルゼブブ嬢のお気に召すまま。
Synopsis
Murin's 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... (Source: Yen Press)
Studios: LIDENFILMS, Q-Tec
Source: MANGA