I have watched Chuu2's OP and it's kinda dizzy drive to watch it till' Episode 4 of the anime.
I have sample of OP but its in intrumental version, yea I edited it so it'll look like karaoke XD
Sparkling Daydream is a good music for because I like the sound and the beat of it. It's a different from other anime OP that I have watched and that includes a [Guitar/Drums] but doesn't and yet this one is powered on synthesizers and piano which is nice one!
This is my review of Chuu2's OP