Kizumonogatari III: Reiketsu-hen

With help from Meme Oshino, the apparition specialist, Koyomi defeats the three powerful vampire hunters: Dramaturgy, Episode and Guillotinecutter. Koyomi takes back all the limbs of Kiss-Shot-Acerola-Orion-Heart-Underblade in order to become a human again. But, when he returns to Kiss-Shot, she reveals to him the cold truth of what it means to be a vampire--a creature of the night. Unable to take back what he has done, Koyomi feels nothing but regret and can only deny his dreadful fate... (myanimelist.net)