You were running around katsuki's house, as he chased you.

"YOU LITTLE SHIT!! GIVE ME MY SHIRT BACK!!" he yelled at you, and groaned.

He caught up with your speed and grabbed your arm and pulled you into his arms. he wrapped his arms around your waist with a smirk

"You brat, you think you could just get away just like that?"

You two would often argue like crazy siblings, but deep down, katsuki is in love with you.