It's a really bad power fantasy with an academy setting. The protagonist possesses the body of an originally weak character. Yet, for some reason, the author abruptly pivots it to being that the protagonist is someone who obtains the memories of a person who played a game of the world he is living in. It's a very strange decision which messes with the flow of the story because the author now has to contend with the fact that there must be justification for making the originally weak character into a strong character without cause. This could have been avoided if the author just stuck with the original premise. It's a mistake I see all the time, though usually in Japanese stories. It was surprising to see it in a Korean story.
Nonetheless, this element is always followed up by more of the same kind as the author simply does not understand how to encapsulate their story to the essentials without adding unnecessary information nor how to retcon information smoothly. Like, my guy, you retconned in the second chapter. It means you don't do any planning ahead of time whatsoever. Even if the author didn't do this, the story is too simplistic to the point it feels like I'm reading something for kids. 6/10