I swear I had to listen to Perfect first and then switch to the instrumental because I couldn't believe my ears that "e-e-e" was maru's voice. But indeed, it's not in the instrumental so it's his voice @.@ SHOCK!

I agree, all of them sang YnH with a different feeling, I noticed it too. I'm glad to see that they also noticed it :) I mean, they noticed that the other 4 were singing in a different way. Indeed, they put lots of passion and feelings in this song.

You're welcome!