Shin'yaku Märchen
The art is magnificent but the story lacks coherence a bit I must say. NOTE: This is actually author's take on a musical related to different fairytales including Peter Pan and other classics ( ofc their darker version). I don't think I'll like this though because the mother of the boy (white head in cover) died accused of being a witch and he actually died as well but came back as a cursed zombie of some sort. Also, the girl (blonde head) committed suicide I guess ( by being burnt on sticks) and her soul possessed a doll which kind of looks like her and the boy carries it with him. Their goal is to make sure to get revenge and help others to get it even by means of killing and whatnot you know...
Resurrection of the Catastrophic Hero