This is the one that finally let the sprites move. Three episodes, no filler, just Kyosuke Nanbu driving the Alteisen Riese straight down the throat of an enemy formation because the worse the odds get, the more he likes them, with Excellen flirting over the comm from the Weissritter while she does it. The Vartoul drones and the ODE network give the fight an actual pit in your stomach: a defense grid that needs a living person wired into its core, feeding on human organs to stay online, which turns a mass abduction plot into something closer to body horror than mecha spectacle. Ryusei and the SRX crew get their moment too, and the animators clearly cared more about a stake driving home at point blank than about clean CG polish. It plays like a game you loved finally being taken seriously by someone with a key animation budget. Short, mean, and it respects that you already know these pilots by name.
Earth's defense hinges on an automated network called ODE, a system designed to protect humanity from extraterrestrial invasion through swarms of unmanned combat units. The architecture sounds flawless until its terrible secret surfaces: the network requires a human being at its core, sustained by harvested organs to function. When these supposedly protective drones begin kidnapping civilians en masse, pilot Kyosuke and his squad receive orders to investigate and stop the abductions. What unfolds is a collision between mechanical efficiency and human cost. The anime questions whether a defense system built on such exploitation can ever truly protect those it claims to save. Characters confront the moral weight of survival when the machinery meant to safeguard civilization feeds on its own people. Tension builds as Kyosuke uncovers the system's true nature and must decide how far he'll go to shut it down. Claustrophobic and thought-provoking, this OVA combines robot combat with genuine philosophical unease. It appeals to viewers seeking mecha action grounded in real ethical stakes rather than simple good-versus-evil spectacle.