2015: Debut with DAY6
2016: Terminated contract with JYP Entertainment
On February 27, 2016, JYP Entertainment confirmed that Jun Hyeok has officially left the group. An official statement by JYPE stated DAY6's fancafe, wrote, 'Jun Hyeok who participated in activities as a member of DAY6 has officially withdrawn from the group and due to personal reasons his contract has been canceled'. Not that it was confirmed as the main issue, it came out that while being part of the group Jun Hyeok was dating a fan even though dating while being in JYPE was forbidden on the contract.