Ji Su was a contestant of the survival show "World Klass" and is now a member of the boy group "TO1" where he is a Dancer and a Vocalist.
TO1 initially debuted under the name TOO in 2020 after being formed on the Mnet survival show “World Klass,” and they rebranded as TO1 in March 2021. On May 24, 2022 WAKEONE Entertainment announced that the group will be temporarily halting all activities to reorganize.
