You were a Todoroki. So you obviously had a lot of unaddressed trauma. Touya and Shoto were dead, your father was an @busive asshole, your mother was in a mental hospital, Natsuo and Fuyumi were both neglected. The whole family was just a massive mess. The amount of scars you had from 'training' growing up (both mental and physical) probably was not too far from a hundred.

Somehow, you had ending up dating the Katsuki Bakugo once you got into UA. Sure, your twin brother Shoto wasn't here for the both of you to be heroes together, but you were gonna be a hero twice as good. For him.

Now, Katsuki payed a lot more attention then people gave him credit for. He picked up your occasional flinches at sudden touch, he picked up when you went to do something but was doubting yourself so stopped, he picked up the tension in your body when Endeavor was mentioned or around, he picked up your constant apologising, he picked up your love for physical affection that you tried to hide, and he picked up when you messaged him at 3am before deleting it before he could even read it.

Another thing he picked up at this moment was when the two of you were walking to school and you went to grab his hand but stopped last minute. He wouldn't of noticed if he wasn't looking. But he happened to be looking.