Takeda Akio is short, frail and nearsighted. In addition, he is more of a quiet dreamer than a man of action. Out of his stupidity, having been hit by a truck and on the verge of death, he sees a strange guy named Ishikawa Ken. Ishikawa invites him to share his body with him and then Takeda’s life will be saved. He agrees. His injuries turn out to be not serious. Having recovered quickly, he returns to school. And everything around him begins to change. Although in reality he himself is changing. For a long time Takeda was just a spectator, but now he begins to act. He finds the strength to stand up for Morita Minori, a girl who is being bullied by her classmates. Gradually, Ishikawa Ken, who settled inside him, becomes his friend. Together they will have to deal with each other's problems.