Stupid question...

[ikujinashi]

... but this have been bugging me for AGES now. Or well, since Harvest got out. Who is it that sings the first part in "Mr. Traveling Man #2"? I guess it could be Nagase but I'd think I know his voice well enough by now... It doesn't sound like him. My first guess is Leader but I have nothing to base this on, just a guess. So... anyone willing to help me out? It's seriously driving me nuts. XDD

... a colorcode would be awesome. Though I think I know who does the harmony; Yamaguchi and Kokubun? But I'm not sure. XD Anyway. Who starts it? XD Help please?