Since it's still tagged as incomplete, are there any side stories or extra coming up?

My guess is no- I don't know if it's either Mangago or the uploader that has to do it, but sometimes (if not most) they don't get marked as completed even though it actually is.

Dang. I was hoping there will be extras or sides ╥﹏╥

I mean the author has posted 1 mini side story