I would like to be an agent who sells men's clothes online. People nowadays love to wear something like Koreans. So, I would like to be the middle man. Can anybody help me?

I don't understand what you mean bro. Are you asking for where to get the source or how to do import them?

For a start, maybe you can order from Taobao from the many agents here in Services Noticeboard. Taobao = Korean/Taiwan @ designs, made in China @ product. E.g:
1. http://forum.lowyat.net/topic/622850
2. http://forum.lowyat.net/topic/1263329
3. http://forum.lowyat.net/topic/1111315/
Good luck!

Why don't u just deal with the dealer by yourself?many people nowadays just performing advertisement in facebook then make a pre order services..customer should wait for their stuff at least 1 week before the stuff arrive in malaysia..