Dear god, that music sucked ass.
I feel your score has been lowered for 1 reason. This song sucked major ass. It was too upbeat and cheery for your theme of noir, saddening revenge story which usually follows all anime styled music videos, seriously... it's all been done before.
I'm giving you a 10, even though the music sucked, it was off-tune and the storyline sucked because the animation was wonderful. The visuals consisted to be amazing throughout the entirety of the animation, the animation was unbelievably fluent and mixed with these well wrought out visuals only ensured your success.
But to be honest, if you had fixed the music and storyline, it would have been oh so much better.