However, Elton John's concert in South Korea and his poster advertisement that said "the best singer-songwriter in the world" left a deep impression on Choi.

[5] In his middle and high school years, Choi met his future Jannabi bandmates Jang Kyung-joon and Kim Do-hyung, and they would regularly perform at Bundang Central Park.

[8] Following graduation, he gained admission to Kyung Hee University, where he majored in business administration, but decided to take a year off from college to pursue music.

[9][10][11] He trained at FNC Entertainment, nearly debuting as a member of N.Flying, but decided to leave after realizing his creativity was restricted by the agency and he had a different musical style from the group.

While Kim Do-hyung and Yoo Young-hyun were eliminated, Choi continued to participate as a member of the newly created vocalist group Plan B.

In the same year, the band has continued to release digital singles November Rain and Pole Dance, its first extended play (EP), See Your Eyes, and several original sound tracks for Korean television dramas.

[16] In 2019, Jannabi has created an unprecedented sensation after releasing their second studio album Legend with the title track "For Lovers Who Hesitate."

[17] On July 18, 2021, despite Kim and Jang Kyung-joon being on a hiatus due to military service, Choi continued to promote the band with session musicians, releasing their third studio album, The Land of Fantasy.

The show centers on the journey of Korea's famous senior actors in singing songs together while telling the stories of their lives.

[31] He created the Korean language version of the song "This Is Me" which was performed by the choir at the 58th Baeksang Arts Awards to conclude the show.

[33][34] The exhibition follows Choi's daily life from morning to night, showcasing his point of view and his brother's photographic works.

[49] Choi cited artists he grew up listening to, such as Elton John, Sanullim, and The Beatles as his biggest musical influences.

[50] He explored a wide array of genres, including folk, ballad, progressive rock, and chamber pop, with the intricate use of string orchestra and choir.

The inner monologue that only one person knew resonated with many people, and their emotional support ultimately led to who Jannabi is today.

[61] As he shared during his appearance in KBS' Stopping on the Road Once in a While, "When I write lyrics, I felt that it would be really nice if someone could feel it as much as my emotions, so I am grateful (for empathizing).

[63] Popular music critics Jung Min-jae and Kim Seong-hwan noted his unrivaled expressive power with "the charm of dramatic vocals like flowing water.

"[66] In September 2021, Choi was chosen as the model for the fall and winter sneaker collection of Umbro, themed "Heritage of Passion.

[76] Choi has regularly donated the band's festival appearance fees for scholarships, school development, and educational environment improvement.