The Manga is uploaded on Nicovideo which went offline to update their security measures after hackers stole their data.
Now is back online, however the new chapter is not, I would assume that once that is uploaded then the scanlators will translate it.
I feel like their whole marriage could have been saved if they just talked about their issues. The whole time travel thing is just like a marriage counseling session. So it makes sense if this is going to be a short manga. For me it seems the artist just wants to bring his point across and that is completely fine by me