 K joined Nodo training center, 2nd infantry division of 1st ROK Army, in Gangwon-do Yanggu to fulfill his mandatory military service on May 8, 2018.He received a silver medal with an honorable mention from the commander of the division for his outstanding performance as a trainee at the training camp graduation ceremony.After completing the training session successfully, Jun.K was assigned to a military band as a saxophone player and a singer.