This is a coach!Rin, athlete!Haru story and is not a Haru/Rin story. It's about a man whose own dream couldn't come true, so he helps another athlete achieve one. Makoto features as the best friend.
4/5. Rin lost during the Olympics and became a coach for sixth graders. That's where he met Haru and saw that the kid had potential, able to continue Rin's dream. They proceed to practice and went to some competitions.