Responses

I'm not sure what exactly you're referring to as I didn't reread the chapter, but I assume you're referring to the game system? To which no, none of them think they're in a game - the system of lvls etc is normal for their world, at least with the dungeons appearing.
"The system" is actually a pretty common trope in stories/worlds with dungeons, especially in the action/fantasy genre, but it's not uncommon to see within the rofan genre either nowadays. Ig it's more common to only MC having the ability to see it with the latter, but yeah. ╮( ̄∇ ̄")╭
I'm in chp 4 and I'm confuse like the other character expect FL knows that they are inside a game or something??