Following the regular season, in which each team played each other three times, Gimcheon Sangmu were the champions, gaining direct promotion to K League 1.
Gimcheon Sangmu FC, being a military-owned team, is not allowed to sign any foreign players.
When the first and second round matches were finished as draws, their winners were decided on the regular season rankings without extra time and penalty shoot-outs.
Gangwon FC won 2–1 on aggregate and therefore both clubs remain in their respective leagues.
Suwon FC won 6–4 on aggregate and therefore both clubs remain in their respective leagues.