I wonder when this main story will be finished... I hate playing it every time from beginning and end in the middle again...

... but it's great game if you didn't play it yet it's a must... nice renders and good plot...
Why would you have to play it "every time from
(the) beginning"..??
If the last time you played was v.016 or older, now you have to download the newest update, because the developer had to make some changes regarding some "night scenes" as requested by Patreon.
He had to remake the game because of this and that took him a year.
Because of this, old saves will not work with the new updates (v0.17, v0.18, v0.19, or v0.20). You have to start from the beginning with the newest update and make new saves. If you do this you don't have to start every time you want to play.