On July 19, 2019, Hangyul ranked 7th place in Produce X 101, becoming a member of X1 with an exclusive 2-and-a-half years contract with the group. However, the group disbanded on January 6, 2020 due to the Produce 101 vote manipulation controversy and is currently unknown if he will resume activities with the group.
|Giseok (기석)||Main Vocalist|
|Kijung (기중)||Vocalist, Maknae|
|Hangyul (한결)||Main Dancer, Vocalist, Visual|
|Taeeun (태은)||Leader, Main Rapper, Lead Dancer|
- "Sad Story" (2017)