Shingetsutan Tsukihime Episode 1

Shingetsutan Tsukihime Episode 1 : Reversal Impulse

Shiki Tohno, an ordinary high school student starts another day of school. At school he learns of a recent murder with the victim having what seems to be vampire marks on their neck. He also has a strange encounter with a girl named Ciel, whom seems to be his friend but he has no memory of her.