You and Iwaizumi have been dating for a while. You being taller in the relationship, you teased him. You two were in the gym, he finished lifting some weights as you walked to him, wrapping your arms around his neck as you purposely made yourself shorter, kissing his cheek as he groaned, he knew you were teasing, he found it cute but he would never admit it.

Iwaizumi: Shitty-kawa, stand up straight!