Why must they do eight bars of heavy metal guitar in-between the chorus and the line, instead of just four? I think four would be a little better...it wouldn't draw as much attention to how incongruous the whole thing is in comparison to the rest of the song.
silly go round - FJ Yuuka (just hear it for the first time, and it really sounds like parallel hearts. wait, silly go round released long before parallel, so parallel hearts really sounds like this one)
silly go round is more catchy, though. Yuriko's background is MORE LOVELY THAN yuuka's voice~~~~