The cause of the incident was that a man named "LexBurner" uploaded a malicious video about "French lover" (the video has been deleted at present). In the video, "LexBurner" said that he was "looking forward to the next plot", even though he spoke out about some plots in the comic book.

There is a boy who was once called a child prodigy, code 0 16, and his name is Guang. But now he has fallen to the bottom and is an unwelcome existence. If he doesn't take FRANXX, it's as if he doesn't exist. In front of such a vast field, one day, a mysterious girl named 02 appeared. There are two beautiful horns on her forehead. -Got it, honey.

Plot introduction:

The distant future. Mankind has built a mobile fortress city "plantation" on barren land, eulogizing civilization. The driver's residential facility "Mistin" built in Nadang is commonly known as "birdcage". The children live there. Know nothing about the outside world. Know nothing about the free sky.

They were told that their task was only to fight. The enemy is a huge life "dragon", and everything is covered up by mystery. In order to fight against the unknown enemy, the children boarded the robot named "FRANXX". They firmly believe that riding in it is proof of their existence.