Nobody knows about Sousuke's injured shoulder and nobody knows about Ai's asthma. They end up finding about each other's problems. How will they be able to manage their relative problems withou letting Rin, Momo and the whole swim team know?

[From The Story] In Rin's eyes, Nitori had always been weird. He was always happy, he was always optimist. They had been living for almost a year in Samezuka, yet Rin had never seen him cry, not even once. Not even when he lashed out at him, using words that had brought anyone, Rin himself too, if they had been said to him, to tears.