On March 16, 2017, Hyun made his debut as a member of Seven O'clock with their first mini album Butterfly Effect.
On October 4, 2019, it was announced that he, Jeonggyu, and 2Soul would go on a temporary hiatus due to health issues.[1]
On March 2, 2021, Forest Network announced that the group had disbanded but was in discussions regarding future individual activities for the members.[2]