SEVENTEEN's Seungkwan Cheers On His Sister As She Performs On "Duet Song Festival"

On October 28’s episode of MBC’s “Duet Song Festival,” SEVENTEEN member Seungkwan joins the audience to cheer on his older sister!

Seungkwan’s sister Boo So Jung performs with her partner K.Will on the show, but before their performance, host Sung Si Kyung asks her if she’s talked to her brother. “I did,” she says. “But he’s busy, so I’m not sure if he was able to come.”

The hosts say they heard he was there, and Boo So Jung seems surprised. Seungkwan then raises his hand in the audience, before getting up and introducing himself. Sung Si Kyung tells him to cheer on his sister, so he says in his Jeju Island dialect, “Noona, fighting!”

When asked if he thinks K.Will is someone he feels comfortable entrusting his sister to, Seungkwan replies, “He can take her!”

Watch K.Will and Boo So Jung’s performance below!

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