Bokurano: Ours

ぼくらの

On a summer trip to a seaside cave, fifteen middle-schoolers meet a man named Kokopelli who invites them to test a new game: piloting a colossal robot called Zearth against enemies that threaten Earth. They sign on thinking it is harmless, then watch the first battle reveal what the contract really costs each pilot who takes the controls. From there the children take turns at Zearth's helm, forced to weigh the planet's survival against the price the game extracts from them one by one.