The song isn't called BREATH, that's the band's name. The song is called "Hitomi Ni Kugidzuke" It was their first single, released in Nov. 2001, and they're second single was released just a few days ago (Jan. 16). I was waiting for avex to drop them, since it had been such a long time since they had released anything, but apparently not
Which is good, because I love the vocals ^_^ The guitarist has composed some of Ayu's earlier songs (like Depend on you, vogue) There official website is here :
http://www.avexnet.or.jp/breath