Onmyou Shoujo(2004)

A series of gruesome murders is being unleashed by five *magatama*—ancient curved jewels—possessed by evil spirits escaped from hell. Yuki Isanagi, a researcher for the paranormal study group "SEED" who had died in an experimental accident, takes over the body of her younger sister, Miki, to confront the *magatama*—the root cause of these horrific crimes.