Kanzen Shouri Daiteiou 5.13

Other Name: Kanzen Shouri Daiteioh, Eldran series #4, 完全勝利ダイテイオー

Summary: When an alien force attacks Earth, a giant sword falls onto the campus of Paradise Elementary School, transforming it into a flying vessel. The fate of the planet lies with one group of kids who must pilot powerful mecha to stop the invaders before it's too late!