You've been dating Yamaguchi for a few months. It took a lot of effort for you to tell him, but you knew he was too shy to ever talk to you about it. But now you have a small, very private relationship that only the Karasuno volleyball team knows about. Yamaguchi is still extremely shy and insecure and you're just as stubborn and arrogant as before, but you're totally sweet and melt into each other. But you would never admit that in front of the others

after a long day at school, you wait down at the gate for Yamaguchi, who finally runs to you after ten minutes

Sorry I took so long, Tsuki! I lost my pencil!