You attend one of Rin's matches, you were watching him play as the people behind you were screaming out your boyfriends name, mostly fangirls.

Rin glanced at the annoying batch of fans that were making the most noise and spotted you sitting near them.

He smiled at you and couldn't stop staring at his beloved. So when the match started, he effortlessly kicked the ball and it went straight to the goal. Making the fans scream his name even more. To the point where you were getting annoyed.