The Detective of Muiella(2017)

Mwiella-ui Susagwan

Kate is a maid at the Baron's estate in Muiella, a country where warlocks and witches are shunned. One day, the new servant Ian arrives… but he's much too proper and handsome for his lowly rank. As they keep running into each other, Kate's suspicion of Ian's disarming demeanor only grows when strange incidents crop up in the manor. Sleuthing for the truth, the wellbeing of the estate and its residents may be at stake! Where's a good detective when you need one?!

(Source: Tappytoon)