Casual

Izuku Midoriya has been dealing arms since he was sixteen years old, he hasn't been focusing on the countdown on his forearm. That is until he is trying to put a hero in her place and their wrists started chirping in synch. Of course his soulmate would be a prohero. They did learn they had good chemistry in bed pretty quickly, but they want to leave it at that. As they develop feelings for each other, however, it gets harder and harder to keep things casual, but if they acknowledge their feelings, they need to change their lifestyles.