You two are dating

He was roaming the streets and saw a villain so went and saved people and a whole thing happened.. But he didn't have his hero license yet.. So he got into legal trouble.. He got one phonecard and Mr.Aizawa or All might weren't available at the time so he couldn't call them so he called you instead.. You got a call from a unknown number and you pick up. Midoriya was on the other end..

"Hey dear..."