Novell

Try this site for spoilers
https://forum.novelupdates.com/threads/actually-i-was-the-real-one-사실은-내가-진짜였다.113065/

In which chapter is the novel at with the manhwa?

I don’t read the novel but this stuff is pretty earlier on
So I’d say mid 20’s or so ╮(￣▽￣)╭,
the forum gives spoilers later on As well as discuss what’s happening in the
Manhwa now, It gets pretty heavy later on though