With the subplots starting to resolve, the series is showing signs of slowly winding towards it's end. However, with Rin and Kureno having entered the story fairly late, it's no surprise that we're going to have to take a step backwards to get their stories before moving ahead again. This volume spends alot of time giving us Rin's story.
All we really know about Rin so far is that she's hurt Haru, who we know and like. But Haru doesn't seem like the type of person to have misjudged someone so badly; and sure enough, as Yuki suspected, there's another side to the story, and Rin isn't as bad as she's making herself out to be. Through flashbacks after Tohru finds her collapsed on Shigure's doorstep we learn the history of how she fell in love with Haru and moved in with Kagura's family, as well as what's really going on between her and Shigure and the reasons why she broke up with Haru, ended up in the hospital, and gave Tohru the cold shoulder. Of course, Tohru eventually wears down Rin's defenses, and by the end of the volume she has a new friend and powerful ally in her quest to end the curse who might turn out being the biggest break Tohru has had so far.
What everyone is probably going to be talking about after this volume, though, are a few discrete frames that make it clear that, yes, Haru and Rin were sexually active during the time they were seeing eachother a year ago. The author's decision to have one of the story's heroes turn out to have lost his virginity at 15 is likely to upset more than just the futile Yuki/Haru shounen-ai fandom - especially the parents of the series early teen and preteen fans.
Also noticable is a slight change begining in Tohru. You can't love people without hurting when things aren't well with them. Akito's threats, Momiji's ongoing and deepening tragedy, the fate hanging over Kyo's head after graduation - it's all alot to handle for someone who is still coming to terms with being an orphan. And this time, we start to see signs that her association with the Zodiac might be starting to wear on Tohru a little. Shigure, too, shows signs of not liking what he sees in the mirror after the way he's been acting lately.
There's also alot of time spent with the student council. Although they're clearly being set up to have a big influence on Yuki, their new prominence at this point in the story is a little puzzling. Hopefully the whole thing is going somewhere.
A decent enough volume, but by no means one of the best.