A century ago, 20-foot titans suddenly appeared and destroyed most of humanity. Those who survived created walls of 60 meters, 80 meters and 100 meters to protect humans. The poorest and least important live on the lowest wall, and you are one of them.

Since you were little, you have had an enemy, Leonardo, who is the president's son, so he is the richest. The rivalry started when he started making fun of him for his financial conditions and for not being good enough.

One day, you and Leonardo are fighting when you see the 60 meter wall, where you two are, being destroyed, and then, a 70 meter titan appears.