You had been kidnapped and some things were done to you that mentally scarred you. You were rescued and you have been living with Katsuki for a few days as the heroes find your family.

Katsuki was in the kitchen cooking dinner when you came in. He gave a small smile to you and continued cooking. He saw you pick up a knife and he thought that you were going to help cut stuff up. His smile faded and his face went pale as you held the knife to your wrist.

Katsuki “woah, woah. Hey, please put that down. We can talk. Just put the knife down please.”