Midara na Kimi ni Kamaretai

Sinopsis Midara na Kimi ni Kamaretai

Akkun has finally gotten into his dream high school. He can't help but attribute his success to the only teacher who supported him, Chizuru-san. When Akkun visits her to say thanks, he discovers that the doting and beautiful Chizuru-san is no longer a teacher, but is now living the life of a recluse. And after witnessing her lust for blood, he finds out she's a vampire, too! (Source: Comikey Media)