A hurt god hands a giant robot to fifth graders and walks away. That's the entire premise, and the original series makes it work by treating those kids like soldiers who have to grow up fast. This OVA picks up after that collision between childhood and necessity, four more episodes of elementary school students carrying the weight Eldran left behind, fighting an alien empire that doesn't care how old they are. The mecha itself becomes secondary to watching kids who should be playing soccer instead make life-or-death calls in a cockpit. By the time the original series ended, you weren't watching a robot show anymore, you were watching a story about the cost of responsibility. This continues it.
With Eldran gravely wounded and the Jaaku Empire's forces still scattered across Earth, the young students of Class 5-3 must deepen their commitment to protecting the planet. The Raijin Medal rests in their hands now, and they've only begun to understand the weight of that responsibility. New threats emerge as Jaaku adapts its strategies, forcing the children to grow not just as pilots but as leaders and warriors. Their bond strengthens through each battle, testing whether elementary school kids can truly shoulder a mission meant for adults. The OVA picks up where the series left off, pushing the narrative forward as the kids face increasingly dangerous encounters that threaten everything they've learned to protect. Their childhood and duty collide in ways both thrilling and sobering, revealing that saving the world requires sacrifice no child should have to make. The fight against Jaaku intensifies, and there's no turning back now.