Dark anime, maybe it’s the most suitable genre for this Anime, from the story, character and even some gore and violence scene that you'll meet in the first ten minute. Actually I don’t expect such a great story from this anime by chance I came across the first episode. I finish the entire episode just in one sit. “What the fuck is that?” it’s my reaction from the first scene, but after finish 13 episodes I found it's very beautiful, maybe I can said it better than most anime, but it’s not the best anime I’ve ever seen. It involve almost every human emotion ; Love, hate, anger, betrayal, vengeance, loneliness and happiness.