I downloaded just fine though only to find out it's Korean raws (: I found the Japanese raw on other site but it is till Volume 2 only. This is the link if you are interested: http://manga-zip.net/archives/91084.html
Spoiler
.
.
.
.
.
What do you mean by Shun introducing her to an elder? Who is this she? The other woman or is it Mariko.
I would hope Mariko and Niram would become official. There is some many more volumes left so there is a chance. But I have also heard that the progress is very slow.
Although I picked this up because of the time setting. I love the time period. Sensei's other work in "Golden Days" is also very good. I just don't hope the story progression is not that slow.

Here's the raws up to volume 3
http://love-manhwa.blogspot.com/2015/01/madame-petit.html