Beautiful Time with You Under the Cherry Blossom Tree

They have dreams. One day, the dream of flying to the vast sky. Know how far away the sky covered by glass is. Distant future. Human beings have built mobile fortress urban "plantations" on the deserted land and are praising civilization. The driver's accommodation facility "Mistetine" built there is commonly known as the "Birdcage". The children live there. Know nothing about the outside world. Know nothing about the free sky. The only mission they were told was to fight. The enemy is a huge life form called "Dragon" that is shrouded in mystery. In order to fight against unseen enemies, the children ride on robots called "FRANXX". They firmly believe that riding in it is proof of their existence. There was a boy who was once called a child prodigy. Code number 016. The name is Guang. But now he's hit rock bottom. It is an existence that is not needed. If you don't ride FRANXX, it's like it doesn't exist. In front of such a vast area, one day, a mysterious girl named 02 appeared. There are two gorgeous horns on her forehead. "——I found it, my DARLING" After the war... 02 Meet Guang in the human world again...