Lee Jae Yun is a South Korean idol and a former member of the group "TO1" which was created by the survival show "World Klass". Originally he wasn't part of the lineup but was added in due to one of the members leaving before debut. 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 would be temporarily halting all activities to reorganize. TO1 contract with their agency WAKEONE ended on December 31, 2023. (Source: Soompi) Watch drama online for free.