Business Proposal star, Kim Sejeong held her concert The Tenth Letter last February 21, 2026 at the New Frontier Theater, presented by Wilbros Live.

For many, this was more than just a concert. More than anything, it felt like an intimate letter written directly to her fans who have walked beside her for a decade.The night unfolded as a nostalgic celebration of her 10-year journey, blending music, memories, and quiet reflections that resonated deeply with the audience.

She opened the night with a wave of nostalgia with her performance of Something New instantly transporting fans back to the early days of her career as a trainee, one of the songs she covered in Produce 101 when she started gaining traction. This was definitely the perfect way to set the tone for the evening. 

She even invited fans onstage who came dressed as her from different eras. These fan looks were inspired by  “School 2017”, “The Uncanny Counter”, and her attire as a contestant in Produce 101. This turned the segment into one of the most heartwarming highlights of the night. The interactions with Filipino fans brought bursts of laughter across the venue as they fangirled the moment they stood beside her. Sejeong’s charm and aura lit up the room as she asked each fan when they started supporting her and how long they had been by her side, making the exchange feel deeply personal.  

In between sets, she also prepared fun games to entertain everyone. The first game was called “Pieces of Memory” where it unveiled close up photos from way back. She had to identify when and where this took place. The silliest part of it all was that her fans knew her more than herself, whether it was her first post on instagram or a musical she debuted in.  

As the night went on, fans were already buzzing for more songs they knew and loved, and Sejeong delivered. She surprised everyone with Gugudan realness as she performed A Girl Like Me, The Boots and forever fan favorites like SKYLINE, Flower Way, and Let’s Go Home.  

The Manila stop of The Tenth Letter was more than a performance, it’s a heartfelt celebration of a decade long journey shared between an artist and her fans. With every song, every game, and every candid story, Kim Sejeong reminded everyone why she has remained such a beloved figure in K-pop.