Hello, newbie need help

Hello everyone
I am new here, and i need help to find a Japanese song
Would someone be able to help me?
This is a Hong Kong CM
Hope someone can give me this name of the song or the artist.
If not, one or two sentences of the lyrics will help me alot
Thanks alot

youtube ...after .com please add "watch?v=7GUiug7RQ_U&feature=related"
to view

The clue:
in youtube ~ please type "AMOY" (probably the first clip)
is a clip post by " at7hk "

Sorry, I don't know the song..... I mainly listen to Visual Kei....and the song does not sound like it.

Hope you find out the song

EDIT:
I just heard the song in the ad again and one of the sentence translated literally "Last? summer, you and me started. Last summer, we had met?"

Not sure ;p.... Don't they usually put the song name in the corner of the video? I Don't know about HK ads... but Japanese ads put the song name on right?

thanks for your hints

they didn't put the song name in the ad
i don't know why...but i think H.K is not usually do that in the CM

i am interest in it, because most of the H.K forum are talking about this song.
some of the members can speak Japanese.... so i am just little curious how come still no people find out the song name yet

thanks