I found this part of the song after "Bokura wa Moonlight". I don't know exactly whether this is what he says but sounds pretty close:
"What kind of feelings do you have in your heart?
What kind of things do you feel in your head?
You wanna change the world in the moment
You have to change, fill in that attitude"
And of course, source: https://atashi.wordpress.com/2006/09/03/x-x1999-opening-theme-ex-dream/#comment-53152