the first time i listen to "BRILLANTE, i was like... "What the.....". The song itself is just okay and different from any of Ayu previous release..A standalone track in Ayu's albums.. just like "Sexy Little Thing" in RnRC, .but if it become a single, i don't think it will receive very well in Japan. Since the people there are suckers for ballad (i think..). Among all of the songs in FIVE, i think "progress" will get more success than the others.
Well, it's just my opinion
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EDIT :
and for the new album~ I hope Ayu will release at least one song compose by herself~ and that would be great since most AHS members really missed her beautiful work
....and that includes me!!!!
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and Ayu, please release a beautiful ballad. as beautiful as CAROLS