Responses
I checked that on the manga updates: https://www.mangaupdates.com/series/qjyn9s6/akete-mo-kurete-mo-zoku-itsuka-koi-ni-naru-made
I also did a research on the author's works which is how I found it.
The original timeline for this is actually like this:
1. Itsuka koi ni naru made
2. Akete mo Kurete mo: Zoku: Itsuka Koi ni naru made (story of Chiaki and Kazuma's college life or working life I think)
3. Kazoku ni Narouyo
Though sadly, there's currently no english translation available for the 2nd one. I hope someone picks it up or an official english translation will be available soon.