Mabarai-san Hunt Me Down

Her hobbies are shopping, desserts... and killing vampires. One day, a girl transferred to my school and stunned the class with her shocking self-introduction. She will turn my my dull gray high school life bright red. A unique coming-of-age love comedy between a "self-proclaimed vampire-hunting gal" and a "high school boy who lives in the shadows"! (Source: Kadokawa, translated)