About to watch Shingetsutan Tsukihime
What am I in for?
Are you watching it in Newgrounds or YouTube or something, OP? There's no Tsukihime anime so I can only imagine you're watching some sort of fanwork. I bet it even has Flash-tier animation.
It's inaccurate to the source material and skips A LOT of details. Just read the manga if you don't want to read all the way through the VN, although it would be better if you did that.
Long as we're here, let's talk about best girl.