A 90s OVA that knows it only has two episodes to prove itself, so it refuses to waste time on exposition you don't need. The mecha academy setting grounds the mystery in something human, Hikari stumbling through pilot training while everyone around her keeps quiet about what they're actually looking for, and the animation holds weight in every frame because it has to. It ends before it should, but that's not a bug; it's the point. You finish wanting more, which means it worked.
Touno Hikari is a student learning to pilot robots at a training facility. She seems unable to do anything right, yet her instructors take an interest in her for reasons that go unexplained. As the trainees keep practicing at the controls, they begin to question what the facility is really for. Then Marie Vlaanderen transfers in. According to her instructor, Marie has spent her whole life in training and stands the best chance of awakening something known only as "it". The result is a two-episode sci-fi mecha action OVA built around that mystery.