I think Ero is being too optimistic here, in him being able to release chapter 6 in a shorter time than chapter 5. I might be wrong (and I hope I am) but didn't he claim that he was feeling a bit burnt out AND that he wanted to focus on the new project?
And narrative wise, that would mean that some of the love interests will have minor screen time, unless the MC realizes how to use his demon powers and do some good old fashioned corruption and probable seduction. Now granted, Nicole is the main love interest but I'm curious to see how the other ladies will fit into the story, going forward.
In short, I hope the dev is right in his predictions and I wish him the best of luck but I will be cautiously optimistic, regarding the next chapter.