Last September Kim Woo Bin announced publicly that he was dating fashion model Yoo Ji Ahn. So fans were surprised to learn this week that the couple had broken up four months ago but decided to keep it private until now.

At the time that Kim Woo Bin went public with his relationship, his agency, Sidus HQ, said that the actor was not the type to try and hide anything. He and Yoo Ji Ahn dated openly and never tried to keep their relationship a secret.

"He does not feel uncomfortable about going public with his relationship," said the Sidus HQ representative at the time. "A young man and woman meeting in such a natural way is nothing to be secretive about."

But then Kim Woo Bin was not as famous a few months ago as he is now. Neither of them had ever made the headlines when they first started dating.

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