Sister to Vampire

Sister Erna, known for her diligence and chastity, faces an unexpected attack from a group of vampires in her church. Despite her initial resistance, the venom pulsing through her veins causes a confusing dilemma between her heart and mind, leading to a captivating vampire romance. This exhilarating one-shot is featured in Volume 7, titled Akuma-teki Yuuwaku Immorality.