Daejeon, 2nd in the second division of professional soccer, won an exhilarating comeback victory over Gimcheon Sangmu in the first leg of the promotion playoffs and was close to promotion.
Jo Yu-min and Joo Se-jong completed the reverse play.
Daejeon gave the lead in the 21st minute to Ji-hwan Moon and was taken away.
However, national defender Jo Yu-min came to the rescue.
In a corner kick situation, goalkeeper Kim Cheon did not miss the ball that was not handled properly and finished with his right foot.
Daejeon, who raised momentum, turned the game over with a goal from Joo Se-jong in the 28th minute of the second half.
The home fans were enthusiastic about the 2-1, exhilarating comeback victory, and Daejeon rose to an advantageous position to be promoted just by a draw in the second leg on Saturday.
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Suwon Samsung, 10th in the 1st division, and Anyang, 3rd in the 2nd division, drew without a score.
The two teams will play their final match in Suwon.