I hoped it would have been released too I was ready for finalising it at the end of november but my coder went MIA completely threw the scedule out but these things happen.
As for the plot I really didn't expect it when I started but the characters are just adorable crack so very loveable. With great voicing and art. Though H-scenes are evil I know that now.
As for proofreading I mean spelling, consitancy, maybe a little grammar or wordplay as I really don't claim to be a literary genius even though english is my first language.
So generally just improving the overall quality of the work before release, a second perspective on it always improves things.