This is their Japanese single due to come out on May 21st, 2008. Somehow, the full version of the song got leaked onto the internet. And here it is:
And here is a 45 second preview of the MV that has not been leaked but will probably come out on the 21st of May.
And if you want the song...click on the more info link. If you can't find it, then click ctrl and f key and type in more info. Good Luck and enjoy!