[quote=Lost Cause]
Kara No Kyoukai, if my reverse googling is up to scratch.
[/quote]

[quote=Rafale]
I think it's Mahou Tsukai no Yoru.
[/quote]

I'm laughing right now because they're the same person, Touko Aozaki. looks like you're both right as far as the character goes but the image itself is from Kara No Kyoukai.