小学游泳选手俊浩无论多么努力，却总是只能在比赛中位列第四名。他的母亲找到了前游泳冠军选手金光洙给俊浩进行私人训练。最终，金光洙的极端训练方式明显地提高了俊浩的比赛结果。
Yoo Jae-sang
Joon-ho
박해준
Gwang-soo
이항나
Jung-ae
최무성
Young-hoon
정가람
Young Gwang-soo
유재명
Coach Park
곽민석
Director Kim
김도영
Restaurant Manager
강애심
Harvard Mother
오대환
Wrestling Coach
김민식
Detective
남문철
Director
Cha Bo-sung
1998 Player
Lee Jung-eun
Owner of Tented Restaurant
