I’m pretty sure that while he is the author of the web novel, he is still needed for the manga. It’s easier to draw the manga if the original author is there to help decipher/explain exactly how he imagined the story would go. Plus I think that it would be extremely embarrassing if the illustrator drew a web novel, only to realize that it isn’t how the author pictured it at all.

It used to get updated every week but it hasn’t been for a while now. I wonder if it’s been abandoned?