Okay - some backstory -
First though, a note that really shouldn't be necessary but sadly probably is - there is no sexual aspect to the relationship at the center of this manga. None. Zero. Zip. So if you're either one of the people who wants to jerk off to that or one of the people who wants to be righteously indignant about it in a vain attempt to compensate for the guilt you feel because you secretly want to jerk off to it, you'll have to look somewhere else.
That out of the way - this was originally self-published, with a different title, on Pixiv a few years ago. The first chapter was translated and I happened across it then and read it and thought it looked sort of interesting, but then there was nothing more.
Just today, I happened to run across this and when I read the synopsis I recognized it - it's the officially serialized version of the same story. And it's currently being scanlated.
And it is fucking amazing.
Again, it's not what one might cynically expect from the premise - not even close. More than that though, it's not what you expect AT ALL. Guaranteed.
This current chapter shouldn't give too much away, and if it looks even the least bit interesting, I strongly recommend going back to rhe beginning snd catching up. It's relatively short and well worth it.
And chapter 8 will blow you away.