Peanut was a Substitute Jungler of NaJin e-mFire in 2015. In the Spring Split of the LCK, they were unable to make playoffs, finishing 6th in the regular season with a 5-9 record. In the Summer Split, they finished 5th with an 11-7 record and were able to qualify for playoffs. But they were swiftly defeated in the first round (1-2) by the KOO Tigers. Peanut would then leave the team in December of 2015 to join the ROX Tigers.