Lesbian Vampires ~Kyuuketsuki-tachi to no Natsu~

During a summer school stay at a mountain boarding house, schoolgirl Asuka wanders into a mysterious mansion. There she meets Haruka, a beautiful girl of her age who lives there in seclusion while recovering from an illness. Asuka soon befriends Haruka and begins visiting the mansion every day. As the two grow closer, Kasumi, Haruka's caretaker, watches their relationship with increasing jealousy.