Shadows House

Shadows House (Japanese: シャドーハウス, Hepburn: Shadō Hausu) is a Japanese manga series written and illustrated by the duo Somato.

Plot
Emilyko is a "living doll," born to serve the mysterious Shadow family. Everyone in that family has indistinguishable features and is made out of soot. The shadows live in a castle, separated from the rest of the world. But behind the seemingly peaceful shadow castle, there seems to be a big mystery...

Official
https://twitter.com/shadowshouse_yj -- Official Twitter