K Over

I know this song from the jdorama H2, and think the song is soooo beautiful, I really cried from it!!

here is the PV
I tried to search for K, but I can't find any information about it, except that he is Korean... Someone help?

I don't know anything, but I want to so bad.

However, I did find several other videos.
Smile (I've also seen it translated into Laughing), Girlfriend, Dakishimetai, and Only Human. He also has three full length albums and three singles. (From YesAsia.com) Apparently his real name is Kang Yoon-sung, that should help in searching. I'll post what I find as I go along.

[Edit]
Birthday: 16 November, 1983
Height: 177 cm
Hobbies: watching movies and playing piano
Official site(s): http://www.k-official.com/ (Japan), http://www.k2004.co.kr/ (Korean)
I haven't found fansites, but there is a fanlisting (where I got the official sites and the info) an a wiki for him. http://wiki.theppn.org/K Also, I was wrong with the count of singles, he's actually put out five singles and has a DVD.