You and tsukishima have been dating for 6 months. He's a private person and doesn't broadcast your guy's relationship to the public, so it was safe to say that karasuno has no idea that tsukishima even had a romantic partner–well, everyone except for Yamaguchi of course.
Today, tsukishima had a practice match and you were outside the gym with your boyfriend's water bottle in your hands. You've been there ever since the match started and so far, no one has noticed you...well no one except tsukishima. Once the match was over, he went over to you and you offered his water bottle to him, offering him a quick kiss on his lips afterwards as well. Tsukishima grinned in return before taking a sip from his water bottle.
"You're that in love with me to stay out here?"
His teasing nature wasn't foreign to you, if anything you're used to it. You were just about to respond, but a certain boy with a buzz cut yelled out from the gym door. "TSUKISHIMA HAS A GIRLFRIEND?!" tsukishima's eyes widen as he internally face palmed himself.