It was the 'We Got Married' star's first time hosting a radio program, and he was understandably nervous about being on air. He tweeted, "In a bit, KBS Cool FM's 'Yoon Han DJ' live show is starting! Please send in lots and lots of stories!!! I'm so nervous. Ehehe," along with the sexy black-and-white photo above.

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Yoon Han filled in for Kim C, who's taking personal time off, on October 28 and 29th, and his agency Stomp Music revealed that the pianist had always wanted to try his hand at being a radio DJ. 

In other news, Yoon Han will be releasing his mini-album and starting off his 'MAN ON PIANO' concert tour in November.