[Seiryuu]

Wow. Took them absolutely forever to come up with this.

On the plus side, they managed to somewhat reverse the NTR, at least for some definitions of the term.

Spoiler:

The fact that Aaya had slept with her brother and thus betrayed Kiiko doesn't change. However, most times I've seen something labeled NTR, it includes an implication that the person didn't just cheat, but decided to end the relationship or at least made it clear that the relationship means nothing compared to what they're now doing and they'd be quite willing to cut the relationship off at the drop of a hat. In this case that's not so: Aaya hated herself for doing something like that to Kiiko, who means more to her than anything, and had only consented to do it once before her brother passes away, out of feelings of pity, compassion, maybe even obligation since she turned out to be the reason her brother'd never found love. It could've been better, but it's made clear that Aaya's love didn't falter.

Still, however good or bad you thought the "truth" behind the betrayal was, somehow this seemed a little bit like a cop-out to me, like the writers wrote themselves into a corner and just scrambled to come up with something. It might be because I'm not all that big a fan of yuri, especially like this, but the end seemed a little lacking to me, either rushed or just weird. Also, concerning the ending,

Spoiler:

I thought the idea of the two of them ending up on an unknown planet was just a little bizarre. Regardless of their powers, to suddenly teleport who knows how many light-years and accurately land on an Eden planet is a little much. Maybe my dissatisfaction comes from the fact that they're doomed to be completely alone after this. A yuri relationship in a world filled with people is one thing, but Eve and Eve doesn't work as well for me.