Bakemonogatari (Manga) 12

"Newcomers and existing fans alike will enjoy diving into the world of Monogatari and meeting the delightful cast of characters. If you're yet to experience this series in any form then this is the perfect time to climb aboard!"
- Anime UK News

Koyomi confronts his final foe, Guillotine Cutter. It's former-human-turned-vampire vs. the human vampire-hunter cult leader. But Koyomi hears that Hanekawa is being held hostage, and to save her, he'll have to push his new powers to the limit.

Is Koyomi willing to lose his humanity before he can regain it?