Ha "KKramer" Jong-hun originally played for Team GBK in Challengers Korea Spring 2015 where they placed in the top eight in the second series. A short time later, he joined the Flash Wolves as a substitute for NL. His first tournament with the team was the 2015 LMS Summer Season, where the Flash Wolves ended in second place. In the 2015 LMS Summer Playoffs, FW lost 3-1 in the second round to Hong Kong Esports. They still had enough circuit points to qualify for the 2015 Season Taiwan Regional Finals where they made it to the finals and took the second Taiwanese seed for the 2015 Season World Championship with a 3-2 victory over HKES. At the World Championship, the FW were expected by many analysts to have one of the weakest showings of any team in attendance. However, after a 4-2 group stage with wins over favorites KOO Tigers and Counter Logic Gaming, the Flash Wolves emerged first from groups, becoming the first team in two years to finish ahead of a Korean team in groups at Worlds. In the tournament quarterfinals, FW lost 1-3 to Origen, earning a top eight finish.
KKramer subbed for Young Boss in the 2015 LoL KeSPA Cup but they lost 2-0 in the first round to CTU Pathos. KKramer left the Flash Wolves in November of 2015. KKramer joined CJ Entus as the starting AD Carry for the LCK Spring 2016 Season in December 2015.
During the 2016 LCK Spring Season, CJ went 8-10 in sets, finishing in eighth place overall for the spring split.
CJ Entus had a very poor showing in the 2016 LCK Summer Season, going 3-15 total in set score. Neither Kramer's performance nor that of the sub ADC Ghost seemed to make a difference in their abysmal results. 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.