 If you liked
Kara no Kyoukai Movie 1: Fukan Fuukei
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 ...then you might like
Kuroshitsuji: Book of Circus
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Both are very dark and serious and deal with supernatural things.
Man can find many deep thoughts in KnK as well as in Kuroshitsuji.
Both anime made me stare into the screen with goosebumps all over my body and just think about it for hours.
Ciel and Shiki (main characters of both anime) have the same voice actress by the way.