Main story: Iku and Keita are childhood buddies. Naturally, having been friends for as long as they can remember, when one started to play baseball, so did the other. During their final year in middle school, Keita's baseball career abruptly ended as a result of the severe injuries he sustained when saving Iku from being hit by a truck.

Presently, they go to the same high school. But ever since that accident, Iku has distanced himself from both the game and his friend, presumably out of guilt. What does Keita think about this?