Tadatoshi Komine, who enrolled in the prestigious Ogami Gakuen in order to aim for the NBA, suffered a serious injury immediately after enrolling and was cut off from his life as a player. Nine years later, Tadatoshi, who gave up his dream, learns that his former teammate Okido made his NBA debut. “If I had to get seriously injured that day”, he thinks. Mulling over his regrets one night, Tadatoshi suffers a traffic accident and is shocked to find that the impact has sent him to a time in high school before he was injured! In order to pursue the dream that he gave up on once, Tadatoshi starts marching again with the knowledge of the future as a weapon!