Volume 4 (in Japanese) is available on this site:
https://www.cmoa.jp/title/135208/vol/4/
You have to buy it tho, I didn't find free raws
I think I'm impatient to the point of being willing to help with typesetting.
Even though I have a harsh agenda and many things to do I'm impatient to read this to the point that I'd be willing to spend several hours a week to typeset this. It's just : I don't read Japanese.
(I actually understand it pretty well but I can't read kanji)
This one has an official English translation, maybe they will translate volume 4 too, I think maybe they will when maybe vol 4 is completed in Japanese ? Idk
https://read.futekiya.com/comic/5e33d84487221
But they did it with all the 3 volumes
Thank you for the chapter (⌒▽⌒)/``