Aizawa was out, so you were tasked with watching Eri, because she was only 7, and you were most responsible, plus, you loved Eri.

So you were at her house, it felt weird seeing Aizawa's house since he was your teacher, but you didn't mind. Katsuki decided to tag along as well, just for fun.

It was getting late and Eri was tired. So, you sat down on her bed and she climbed into your lap. Katsuki sat on the edge of the bed, where your feet rested.

You stared humming the melody to "Dark Red- Steve Lacy" and her eyes started closing. Katsuki recognized the melody and started humming along with you. His voice was so much deeper than yours, but it was still soothing. You played with Eri's hair as her head laid against your chest and she slowly started falling asleep in your arms. Katsuki covered you two with a blanket and sat next to you, watching as Eri fell asleep.