Mistaken as the Academy’s Hidden Final Boss

I found myself in the body of a character I didn’t know from a novel I used to read. It was a cliché story, but after the first twist, its genre changed to dark fantasy. Once I understood my situation, I tried to become stronger, since survival was my first priority. While navigating this new world, I also tried to save my favorite characters. But in the process, I felt something strange. No matter what I did, I somehow ended up in misunderstandings. And these misunderstandings eventually led to one thing: me being perceived as a "Hidden Final Boss In The Academy."