Sunmi openly revealed her admiration for Kim Jaejoong. The video released on Kim Jaejoong's YouTube channel 'JaeChingu' is titled "The Scene Where Deokgyemot Full of Screams Becomes a True Fan." In the video, Sunmi could not make eye contact with Kim Jaejoong at first sight and did not hide her feelings as a fan.

Sunmi stated that her dream of becoming a singer began after watching the performances of BoA and TVXQ. She explained that she dreamed of debuting through an SM audition but eventually debuted as a member of Wonder Girls under JYP. Sunmi said, "I was attached to the best-looking group at SM and expected to debut, but I never got contacted." She added, "The casting director at SM moved to JYP and offered me an audition, so I debuted with Wonder Girls at JYP."

Kim Jaejoong asked Sunmi, "Then why did you debut under JYP?" Sunmi agreed with Kim Jaejoong's comment, "Before signing the contract, your own intention is the most important," and replied, "That might be the case." Kim Jaejoong said, "If you hadn't debuted with Wonder Girls, you might have debuted with Girls' Generation instead, right?"

Sunmi recalled the time when their activities overlapped. She said, "Honestly, after debuting, I was really just waiting to meet oppa." Sunmi expressed regret, saying, "When we were promoting 'Nobody,' the oppas were promoting 'MIROTIC,' and the last time we greeted each other was just a brief encounter."

Kim Jaejoong said, "There were so many people passing by, so it was like that, and it wasn't obvious that you were my fan. To us, Wonder Girls were JYP's superstars." They shared their paths and experiences, reflecting on competition and friendship in the music industry.

This video became a hot topic among fans, and the sincere conversation between the two artists touched many people. The story of Sunmi and Kim Jaejoong shows well how those who have succeeded on their own paths respect and remember each other.