The pool scene at the end of episode 12 was literally the most important scene of the episode. Rin presented Haru with two paths,

the path away from competitive swimming

and the path towards it

and is the first person to ask Haru was is it he wants to do

and Haru is the one that takes the step forward to swim beside the National Team, the first time he’s taken a step forward(figuratively and literally) towards his future.

no but do you realize how wonderful rei is??? like before the episode aired we all thought he was going to leave the swimclub, and the other members thought that too. but he never had the intention of leaving, even after realizing that he’s much better at track than swimming. he stayed for his friends, he stayed because he didn’t want to give up. he is the most beautiful character ever and you can’t convince me otherwise.