The Strongest Blood Hunter [Main: Diabolik Lovers]

Komori Yui is an ordinary high school girl determined to become a vampire hunter. She's working hard to pass the exam to become a registered vampire hunter. One day, her father, a priest, disappears. Then one day, someone from the Church brings her a letter from her father, telling her to stay with a family named Sakamaki. And so Komori Yui, who was determined to become a vampire hunter, moves right into a nest of vampires... Komori Yui: Moving into a vampire nest is one thing. I can treat vampire hunting as an early internship, but why is this nest churning out nothing but NC-model, sadistic, Grade-S pervert vampires? Komori Yui: Sakamaki brothers, don't give up on taking your meds~~