Save Parade Island in a World Ruled by Madmen

Although it is an Attack on Titan fan work, there are a lot of complaints about the original work. Fans of the original work should watch with caution. What was the most difficult thing to do in Attack on Titan? That, of course, is to save Parade Island and make the world accept it. Let's see how the protagonist does this This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.