Well, if she is, I have no problem with it. I'm quite open minded about that, fortunately, and not only regarding artists.
But I personally don't think she's having anything with Midoring other than just friendship. At least not yet, even though there's the GREEN PV and this message, but I sort of feel they aren't enough to make me get hinted about it. Funny enough, if ayu were a man (and Midoring too), I'd kinda be on the other side, and be more on the "certain" side that it might actually be true they were having an affair (hopefully this doesn't kill the concept I gave of being open minded LOL). But it's just how I usually have seen some girls doing (and never guys). Some of them love joking about loving each other, or that they'd totally have an affair with the other because she looks so hot, but they're often just joking. ahha I guess I'm speaking a bunch of nonsense now.