Just don't read it then :)
Not really a fair response when the maybe-incest surprised us after like 40+ chapters. It's different when the incest is an obvious premise from the beginning.
I am on the camp that doesn't mind the incest plotline, but I am still surprised about introducing it this far in.
Makes me wonder if this was an idea for Miki all along that didn't get a chance to be introduced earlier and the author didn't want to abandon that plan.
iirc in the early chapters of Vol.1, before there any hints of Shiho beyond the girl who left the band, there is an illustration with the sister holding dolls of each other, like Himari and Shiho have of Yori and Aki, so maybe that was a bit of a hint of this development.
Anyhow, that aside, I LOVED THIS CHAPTER, HimaYori were so fuuny, AkiShiho so cute, I need the follow up!