Oikawa is a perfectionist. In this POV, you are Oikawa.

Oikawa is still practicing his serves and sets in the gymnasium, it’s far after 10PM and everyone’s already left. Iwaizumi decides to do one last check in the Gym and finds Oikawa. He puts the balls back in the correct spots, and drags Oikawa.

“Shittykawa, you don’t have to be perfect. Stop overworking yourself. I’m taking you back to my apartment.”

Oikawa whines but walks home with Iwaizumi, now Oikawa’s waiting on Iwaizumi’s bed since he’s in the shower.