Kizumonogatari Part 1: Tekketsu (2016)

Plot

Koyomi Araragi's life takes a dark turn when he meets the fearsome vampire, Kiss-shot Acerola-orion Heart-under-blade, dubbed the "King of Apparitions." In a desperate act of compassion, he sacrifices his humanity by offering his blood to save her from a mortal wound. Now transformed and bound to Kiss-shot, Koyomi must confront ruthless vampire hunters who have severed her limbs. As he battles these formidable foes, Koyomi's journey becomes a harrowing quest to restore her power and reclaim his own humanity.