Well fuck, I didn't expect this story to actually develop a good story and universe...Even the shoujo-ai aspect is somewhat unexpected...
I definitely recommend reading all the chapters, the story really changes a lot after a while
Even as a parody of standard RPGs there's a lot of inventiveness on display here, especially with the characters.
Definitely worth sticking with long enough to get to the points where the story starts build up its own identity as something a bit more serious.