 If you liked
Shingetsutan Tsukihime
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 ...then you might like
Kara no Kyoukai Movie 7: Satsujin Kousatsu (Go)
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the main protagonists in both share the same name and the ability to see lines which once cut the whole object crumbles. they both have this dark feel to them and involve a series of murders. if you haven't watch neither i suggest you watch kara no kyoukai first as it is a vastly superior story with better developed characters, drama, and romance.