Tsukihime

After a near-fatal accident, Shiki Tohno wakes up able to see lines of death running through people and objects; anything he cuts along them is destroyed. A pair of special glasses lets him live a normal life, until years later he returns to his family's estate and encounters a vampire. He becomes entangled in a hidden war between vampires and those who hunt them. Tsukihime was the first visual novel by TYPE-MOON and laid the groundwork for its shared universe.