I just finished Infinite Ryvius, and it's amazing. It contains so many themes, and they're all blended together so nicely. It's just amazing.

But there's something I'm still confused about. Nearing the end of the series, Ikumi is always with that long-haired girl. Is that Kozue? I'm guessing it is, because of what happens at the very end of the series. It's just that they look and act very differently.