Bokurano

When a strange man in a grotto offers fifteen middle-school students the chance to test the game he's been developing, the kids find little reason not to accept. Who wouldn't want to pilot a giant robot and face down intruders bent on destroying Earth? Instead of a game, however, the youths discover that the metal giant is all too real--and so are the enemies! It only gets worse when they realize that the 'contract' they signed to play the ...