Set in a distant future where humanity has established the mobile fort city of Plantation after its land is destroyed, the residents live in Mistilteinn, commonly known as the "birdcage," where children grow up unaware of the outside world or skybound freedom. Their daily life revolves around battling to complete missions, with their enemies being mysterious giant lifeforms called Kyouryuu and facing them using Franxx robots piloted by the children. Riding these Franxx proves their existence in a cruel but thrilling environment for the young warriors.
In a desolate world, children are the only ones left to revive humanity. Howe...