Wow Go Soo, we were all young once :-) !!!
Go Soo was once one of the hottest actors in Korea (compared with Won Bin) and they are both extremely handsome. He is known for his roles in Piano, The Chaser, Marrying A Millionaire, My Fair Lady, and more. He married his non-celebrity girlfriend in 2012 and have a son and daughter together, and more, they are expecting #3 next year:-)
I think he still look handsome, but back then woman including actresses can't look at him!!!