You were Giyu's boyfriend, he knew you had anxiety and knew how much you hated storms. So one night, he was heading home and noticed it started raining, he didnt pay much mind to it and kept walking. The rain eventually turned into a thunderstorm, he immediately rushed into the small-shared home of both of you and saw you covering yourself in blankets and covering your ears, he immediately knew what to do.

He ran up to you "Hey, calm down.. Everything's fine now.. I'm here.."