Actor So Ji-seop showed off his unwavering 'Soganji ... Vintage and chic looks such as wide jeans and white T-shirts, light-washed jackets, ball caps with initials, printed scarves, and sunglasses ...

On the actor's birthday, here's revisiting some of his best shows that displayed his range Ahn Hyo-seop in Business Proposal where he plays CEO. There was a theory just as Business Proposal aired: ...