"Volleyball Empress" Kim Yeon-koung has sparked a buzz by sharing the shock and admiration she felt after witnessing SEVENTEEN Seungkwan's professional side in his main career.

On the 5th, volleyball player Kim Yeon-koung appeared as a guest on the popular YouTube channel ‘117’ for the segment ‘Seungkwan’s Bibidi Babidi Boo,’ showcasing her special bond with Seungkwan. During the broadcast, Kim recalled their past connection through a variety show and mentioned Seungkwan's unexpected charm.

Kim was previously only accustomed to Seungkwan as the ‘Boo-Manager’ who helped with her training and handled various chores on a variety program. Recalling her visit to a SEVENTEEN concert at Seungkwan’s invitation, she stated, “I was truly shocked to see Seungkwan doing his main job in a concert hall packed with 30,000 spectators.”

She continued to praise him, saying, “Seeing a kid who usually did all the chores in our team receiving cheers from tens of thousands of people on stage made me realize, ‘So this is the kind of person he is.’ He truly looks the coolest when he’s doing his main job.”

In response, Seungkwan created a heartwarming atmosphere by saying, “I had been waiting for the day you would come. I really wanted to show you why I am ‘Boo Seungkwan’.” It was a moment where his charisma as a ‘global idol,’ hidden behind his friendly variety show persona, was fully recognized.

Kim Yeon-koung also caused laughter by sharing her first impression of Seungkwan, saying, “He was so polite that at first, I thought it was fake and almost cut ties with him.” However, she added that as time went by, she confirmed Seungkwan's sincere love for volleyball and his diligence, certifying their now close ‘older sister-younger brother’ relationship.

Fans who read the article reacted with comments like, “I feel so proud that Yeon-koung unnie recognized Seungkwan’s talent,” “Seungkwan’s charm of switching between Boo-Manager and a world-class singer is exploding,” and “I hope their sibling-like chemistry lasts forever.”