Teen Top's Niel revealed the behind-the-scenes story of becoming a singer through an audition at an amusement park. On the 2nd, a video titled "Starting Today, Switching to Yoo? Jo Line | 15th Anniversary of Debut but the Average Age is Now 31... [Jo Dongari Episode 64]" was uploaded on the online channel 'Jo Dongari.' The video features Teen Top members, who have been active for 15 years since their debut, appearing as guests and sharing various stories.

Teen Top's average debut age was 16.3 years old, and member Ricky was known to have joined the company first. Ricky said, "I used to be a child actor, and they accepted me first after seeing my materials." He added that Changjo and Niel joined around the same time, and Chunji was the last to join. When asked about first impressions, Ricky replied, "Back then, everyone was quite a spectacle. They were all cases of becoming dragons," which made everyone laugh.

Regarding Niel's first impression, Ricky mentioned, "I thought he couldn't have joined if he didn't have a natural voice." Niel recalled, "At that time, I had a buzz cut and liked soccer, so my skin was quite tanned." Ricky explained that Niel was the case who joined after auditioning at an amusement park.

Niel said, "Honestly, I had no dreams of this at all. I went to an amusement park with my mother and a friend, and my mother applied for on-site registration," recalling the situation. "I sang there and came down, and I got cast."

Additionally, Kim Yong-man and Ji Seok-jin reminisced about variety shows they encountered with Teen Top. The Jo Dongari members asked, "Niel appeared a lot on variety shows. Was he in charge of variety shows?" Niel said, "Somehow, I ended up being in charge of variety shows. People said my face is unforgettable once seen, so I continued to be in charge of variety shows after that."

Meanwhile, Teen Top released the mini-album 'Just 15, Just Teen Top' last August. The album received positive responses from fans. Celebrating their 15th anniversary since debut, Teen Top continues various activities and plans to maintain ongoing music activities in the future.