What is this song?

[immel]

Ayu singing a song I have never heard.

I feel like a retard, can someone please tell me?

It's something of the most beautiful I've ever heard.

EDIT: (thanks modoki for telling me)
It's "Haru yo Koi" from Music Fair 21 2003.04.05
It was a special performance where she sang A Song for XX, Haru yo Koi, Tokyo, and RAINBOW

The video is called Tokyo - Ayumi Hamasaki, but modoki is sure that this is Haru yo Koi.

Can anyone provide more information on the Haru yo Koi and Tokyo songs?