Jang "Ghost" Yong-jun joined CJ Entus as a sub AD carry in April of 2015 but he never played a game for them due to being underage. He turned 17 during the second round robin of the 2016 LCK Spring Season but did not debut until Week 5 of 2016 LCK Summer Season in a 2-0 loss to MVP. This ended up being the only series Ghost played the entire season.
CJ Entus had a very poor showing in the 2016 LCK Summer Season, going 3-15 total in set score. Locked into tenth place in the LCK season, CJ Entus participated in the 2017 LCK Spring Promotion. In the first round they were swept 2-0 by Kongdoo Monster, bringing them down to the loser's bracket. There, they beat SBENU Korea 2-0 before falling to ESC Ever in a 3-0 sweep to become relegated from the LCK. This marked the first time an original Kespa team was relegated from the LCK.