On debut Kim lost to the experienced Taek Min Kim a former national champion at Super Featherweight. In Min Wook Kim's fourth bout he struggled again, taking a split decision against Yang Soo Sung another former national champion.
Sung, who had apparently been inactive for 8 years going into this bout, was a teak tough fighter who went 10 rounds with the excellent In Jin Chi and 10 with one time world title challenger Kengo Nagashima. He had had 19 previous fights, to Kim's 3, and had never been an opponent that was easy to beat or get rid of. At the time of the bout Kim was still a raw and green professional who was being pushed in to 8 rounders due to his clear ability.
As a result of the experience and toughness of Sung we saw Kim really struggle though it helped no end with his development and of course he's progressed so much since then and is now a world ranked fighter and a former OPBF champion. Sung however seems to have retired from boxing for good.