On May 20, 2021, he was revealed as a contestant for SBS's audition show LOUD.[2] During the eleventh episode, which was aired on August 14, he received and accepted the casting offer from PSY and P NATION.[3] In the final episode he ranked 2nd in global votes, thus being announced as part of the group.
2022–2024: TNX[]
He debuted as a member of TNX on May 17, 2022 with the mini album Way Up.
On October 23, 2024, it was announced that Kyung Jun had decided to enlist in the military and leave the group upon completing his military service, thereby terminating his contract with the company.[4]
When he lived in Australia, his dream was to become a general surgeon, but when he went back to Korea, he got street casted and his dream started to change to become a K-Pop Star.[6]
He can skateboard, play the cello and speak English fluently.[6]
