You watch this OVA knowing it failed at everything it tried to do. The animation vibrates like the rendering engine is having a seizure, characters flicker in and out of existence, blood pillars stand as solid geometry defying physics. What emerges from that wreckage is something accidentally transcendent: a fever dream where incompetence becomes its own kind of honesty, where nothing makes sense but the sincerity never wavers. This is what happens when ambition crashes into zero resources and nobody stops it. It's not good. It's a document of creative disaster that somehow becomes more memorable than dozens of competent shows.
A Mars mission ends in disaster, and some time afterward, creatures known as Ancients start turning up across Tokyo and wreaking havoc. A small unit of four specialists, three girls and one troubled teenage boy, is sent to fight them, knowing little about the enemy. As they battle, the team searches for answers about what these creatures really are. Then one of the Ancients claims that the team members are the real invaders of Earth. The four are left to question their own sense of what is real in this dark sci-fi horror OVA.