This is another music video with clips from Sword Art Online, and I think it shows a different progression of scenes of Kirito and Asuna’s romance. You can watch Sword Art Online on Crunchyroll.
Okay, I've heard of this series, but I never checked it out ... just watched the trailer and watching the dub online right now ... I think I'm hooked, Camy! =P
I love this series! Sooooo romantic, and a lot of good action too. Animation is really good.