Kakeru Aizawa is the younger brother to Suguru Aizawa, a football prodigy belonging to Japan's under–15 national team. Prior to the series, Kakeru quits his position as a forward after a traumatic experience prevented him from playing with his left leg and settles for a managerial position. After the two are hit by a truck, Suguru dies and has his heart transplanted into Kakeru. With it, Kakeru returns to football to achieve his brother's dream of winning the World Cup.
Aizawa Kakeru is the younger brother of Aizawa Suguru, who is a football prodigy representing Japan in the Under-15 national team. Prior to the series, Kakeru quits his position as a forward after a traumatic experience that prevented him from using his left leg. Instead, he settled for the manager position because he couldn't give up football completely. After the horrible car accident that left Suguru dead and Kakeru fatally injuried, Kakeru was saved by a heart transplant, and the donor of that heart was none other than his own brother, Suguru. With a new chance at life, Kakeru returns to the football field in hope of realizing his and his brother's unfulfilled dream of winning the world cup.