One day, Kohei suddenly quit baseball, which he had been playing since childhood, in order to make his high school debut. There at high school he meets Souta Kihara, who is rumored to be equally popular. While at school, Kouhei rescued Souta from a piece of pipe falling on top of him, Souta became concerned about Kouhei's shoulder, saying, "If you get injured, you won't be able to throw a ball.'' Slowly over time, the two of them grow closer, although Kouhei finds it strange that Souta knows that he used to play baseball.