Tboz - Thats Melty Blood, the storyline in that game follows up a year after Tsukihime. Theres another sequel called "Kagetsu Tohya".
Anyways I've got it on my comp, pretty good game, although as you can see the character sprites are quite pixely. I can bear with it seeing some of the "effects" are abit flashy, heh.
My biggest gripe with this game is you can't fongire your keyboard, so to play it with ease you gotta get a gamepad of sorts.