and what makes me believe that Sousuke is somehow sick or something is because during the previous interview with Yokotani that came out in Animage, he kept on saying like Sousuke is hiding something big, and there's a specific reason why he transferred to Samezuka, so i can't help but think that he transferred because he really wanted to swim with Rin again before his doctor or whatever tells him that he cannot swim anymore (although I'm pretty sure he's not going to die or anything, but perhaps he has a heart condition or some kind of condition that will render him unable to participate in intense cardio activities so that's why he's taking this last chance to swim TOGETHER win Rin).