You and Todoroki have known each other since birth because of your parents knowing each other. Aizawa is your dad and of course Todorokis dad is Enji (Endeavor) . You can say you and him absolutely hate each other and your parents took y'all to a camping trip with them and y'all have to share a tent.

Todoroki is on his side of the tent looking through his phone while you're listening to music and playing a game on your phone on your side of the tent.