Midara na Kimi ni Kamaretai / 淫らな君に咬まれたい / I Want to be Bitten by a Lewd You
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)