The third volume of Tsukihime's manga. Enjoy an older Type-Moon story before Fate rules the board. The manga is a pretty good adaptation of Arc's route plus some other stuff.
I quite liked the aesthetic in these first three volume covers, with a mainly normal looking girl on the front, and the unnatural side plainly shown on the back cover.
Quick catchup if you don't want to read the other volumes:
The MC has special eyes that let him kill things. Killed a vampire, the vampire had him take responsibility to help kill another vampire. The other vampire got killed.