I'm so fucking inlove with this song right now!!!! *screams* *faints* *dies* AAAAAAAAAHHH!!!! xD It's a new song by Angela Aki. Unfortunately, she only performed this song live and there's no studio version but I can't wait till she releases this song as a single!! :D This song is so sweet.. The melody is so sweet. I love last part of the song. The part after she changes keyand from then on! :D *screams* "Lalalala one by one". Just listen to this song and your heart will fucking melt even if you don't understand Japanese! Hah!

Here's the song on youtube:
 
And here's the MP3 version that I ripped from the video. I've been repeating this song for more than 43 times non-stop already!

ONE by ONE - DOWNLOAD HERE.