Ch. 48.6 was incredible, I need more AkiShiho. I need to see Shiho being a complete disaster, Aki leading, and more emotional moments between the two. The part where she talks to Kaori so that KaoMari leaves made me smile and laugh.
Ch. 51 was confusing at first because Miki kept talking about "love" and how she "loves" Ayaka even if it may not be in a romantic way, but after that she talks about how she can't date the one she loves. Is the "love" for Aki similar to the one for Ayaka? It's a rhetoric question by the way, this chapter does make me think that there is some incestous feeling.
Regardless, I'm not really intrigued on this plot, I think focusing on Ayaka would pull me in more because she is cute and a disaster. To me it feels like AyaMiki will be the end of this part anyway, so all the melodrama feels pointless, basically a filler.
HajiMomo would be far more interesting IMO since there is a lot of potential (angst) from Momoka dating the sister of her dead lover.
Also a bit disappointed that Shiho didn't show up still.