@Goldenzeal I mean, he defeated a dungeon that is supposed to be impossible because the levels are too high. His level was showing 1739 (or something) and he got +5000 on every stat.
We don't know other people's levels but usually this kind of development means he is the strongest, though he probably won't know that he's the strongest right away and when(if) he discovers he most likely won't act like it. That's just how these kind of stories go.
Also, we finally get to see the girl on the cover. She's the fugitive. I guess main character is going to save her or something.