Jaehyung and Min are friends and rivals who have been practicing judo since childhood. Contrary to Min's expectation that they could do judo together forever, Jaehyung suddenly disappears in front of Minui one day. A few years later, Min enters Jae-hyung's university and visits him, but Jae-hyung has already given up judo. Min proposes a judo game to change Jaehyung's sudden change of heart.