ロザリオとバンパイア (Series) favorite_border

[DeepL Translation - needs review] Volume 1 Introduction: By chance, Tsukine Aono is enrolled at Yohkai Academy, a school for youkai (monsters). Just as she is about to run away, she meets a beautiful girl named Moeka, and she is feeling super happy. However, she turns out to be a vampire, a great demon that changes when the rosary on her chest comes off!

(Translator: DeepL)