"no, it is a game for people who have no life and are too lazy to get out of their parents basement and actually go see the band because they are antisocial."
Actually:
"One notable characteristic is that none of the members have ever shown their faces in the public sphere as a part of GReeeeN, whether in their promotional videos, CDs, television performances, or the Internet. In their only performance on TV-U Fukushima's music show Music Bar Palo Palo (broadcast on January 19, 2007), the group even went as far as censoring their faces during the performance."
So... it's kinda hard to go see the band who doesn't do gigs.
After reading that, this game makes some sense.
right, I too never seen any of the member face in any of their PV but still if you want cheer, you can do it in front of TV and not on DS, that looks dumb... plus you will look like an asshole