So I was wandering around Japanese Twitter to see the reaction to the release of Volume 1 for this series and I found this, an interview Mayuzuki Jun did with the website ITMedia to coincide with the release of Volume 1: https://nlab.itmedia.co.jp/nl/articles/2002/19/news012.html
I was able to glean that this interview covers what the inspiration was for creating this series and what her thoughts were creating another series coming off of Koi wa Ameagari no Youni. I would greatly appreciate it if Roselia and LED MEX Scans could translate this interview to get specifics on what was talked about.
Edit 2 (February 23, 2020): So there was a Part 2 to the ITMedia website interview that was released today, goes without saying that this needs to be translated in addition to Part 1: https://nlab.itmedia.co.jp/nl/articles/2002/23/news003.html
Edit: I also found another interview published the same day on the Tonari no Young Jump website, this one done with noted Voice Actor Tomokazu Sugita: https://tonarinoyj.jp/article/entry/2020/02/21/170000 It would be greatly appreciated if this interview was translated as well.