TVXQ's Yunho revealed his younger sister on 'Strong Heart'.

Yunho brought a photo of his sister Jung Ji Hye onto the show, explaining, "[My sister is] famous in Gwangju because she's an ulzzang. She's currently working at a bank." The male guests of the show showed a lot of interest in her because of her beauty.

However, Yunho fended them off by saying, "When my friends would ask how they stacked up for my sister, I'd tell them they'd have to get through me first. Once, my friend said he saw some girl that was cute, but it turned out to be my sister."

When asked if he would introduce her to anyone, he confessed, "I think Yesung would be good. He's always serious, so I think they'd be able to talk to each other well."