Itoshi Rin is Itoshi Sae's younger brother. He greatly admired him and enjoys playing soccer with him. He's determined to become the second best player after his brother. He really loves his beloved older brother. But all things changed after Sae's return from Spain. Sae becomes cold and indifferent to Rin. He becomes too ambitious with his soccer career and he tells Rin not to get in his way. Rin becomes heartbroken and angry. Then he's join Blue Block ands determined to beat his older brother.