GACKT Official Weibo update. Translation below:
Jougen no Tsuki ~Saishu Shou~ (2003)
6.Solitude~regret~
The original version of this song was written when I was 14.
At the time, I was very negative, there were only feelings of despair in my heart.
I also had no self-control and was dissolute, dragging myself around everyday.
But playing the piano was the only time when I could focus entirely on one thing without getting distracted.
There would always only be one kind of sound. I guess this is youth too.
Source: GACKT WEIBO
Translation: GACKT ITALIA Team
Translation © GACKT ITALIA