I learned that the second opening for Sword Art Online is going to be Innocence by Aoi Eir. I'd never heard anything by this particular artist, so I searched the name on youtube to try to get a sense of what the song Innocence might be like, seeing as it isn't released yet. This is what I came up with:
[video=youtube_share;_k8toIVA1tI]http://youtu.be/_k8toIVA1tI[/video]
I think I really like Aoi Eir.