Ruki knows. Remi seems to brag to Ruki about what she did, there is some sort of fight between them. After that long discussion between Ruki/Sachi, lots of tears from Ruki and she end up in the arm of Sachi. Don't really know if they are dating but in the end they all seem to be good friend
I've downloaded directly the yuri hime volume (38 to 40)
http://funs-downraws.blogspot.fr/2013/12/comic-yuri-hime-vol37-vol38.html
http://yurilove-neko14.blogspot.fr/2013/11/yuri-hime-vol-39-raw-2013.html
Do not read this part if you're avoiding spoilers.
Basically, Ruki called Sa-chan's cell, and Remi answered. Remi revealed that she was the one who made the mark on Sa-chan's arm. Ruki tries to figure out Remi's relationship with Sa-chan and ends up questioning Remi why she keeps dong things that bothers Ruki. Remi tells Ruki that she loves both Ruki and Sa-chan. How they love, don't understand thing, and go around in circles is cute. Remi wants to be able to see them get irritated and jealous.Afterwards, Remi passes Sa-chan's cell phone back to Ruki and asks if Ruki is going to peek into Sa-chan's phone, which Remi says no. Remi tells Ruki that she's such a good girl.
In regards to Ruki and Sa-chan, they do get together. Sa-chan does tell Ruki about what happened between her and Remi after confirming whether Ruki wants to hear about it. Sa-chan was curious about what Remi was planning to do, and Sa-chan was curious about how she would feel if she cheated on someone. She realized that she was stronger and more terrible person than she thought she was. In other words, she came to understand the joy of being able to do things for herself instead of someone else. Seeing Ruki's weakness makes Sa-chan feel like she wants to protect Ruki instead of letting Ruki protect her. Sa-chan asks why Ruki likes someone like herself when she isn't the type the girl she think it is, but Ruki doesn't know either. The two of them end up hugging. Once Sa-chan goes home, she asks her little sister what would she do if she got a girlfriend. So yeah, I believe they did they get together.
At least from what I can read, that's what I can tell.
last edited at Dec 15, 2014 4:10PM