Hey, there’s a sample of the theme song here: http://www.corda-primopasso.com/sp/special.html.
Please look for this: 試聴はコチラ！And click the linked characters on the website and it will open your Windows Media Player.
It’s about 42 seconds in length. GO for it and listen to the guys!!
Oh my god! It’s the guys~
There are 2 versions of the song set to be broadcasted starting March 9th. I think that it’s a ringtone of some sort and the 2 versions can be listened through mobile phones only but I’m not that sure about that.