The opening three minutes are better than most action anime manage in a full season. Ray is an archaeologist who fights like she's trained her whole life to break things, and the OVA never wastes time explaining why, it just drops you into a temple collapse where brains and violence have to work together or she dies. Two episodes is exactly how long this story needs to breathe: one temple, one mystery, one mirror, and a finale that actually resolves instead of setting up a sequel that never comes.
Ray Kazuki is an archaeologist who can fight as well as she can think, and she's about to need both skills. Leading an expedition to an ancient temple hidden deep in an isolated corner of the world, Ray carries an heirloom mirror from her father, a strange artifact that supposedly unlocks pathways to a lost civilization. What should be a straightforward dig turns complicated when she crosses paths with Mai and Mami Tachibana, a pair of young girls who seem magnetically drawn to trouble. Their recklessness is matched only by their bad timing: the same excavation has attracted Rig Veda, a ruthless operative hunting for one thing only. Ray's mirror isn't just a trinket, it's a key to power, and Veda will burn through anyone standing between him and it. Now Ray must balance her archaeological instincts with survival instincts as the stakes escalate. The only certainty is that her next discovery won't be measured in historical artifacts, but in how far she's willing to go to keep a dangerous secret buried.