SaneGiyu collage

So in this AU Sanemi is a collage teacher and Giyu is his student and wife(Giyu went school at 7 and Sanemi at 4 so yeah no 5 or 7 years age gap) all the students and teacher know and it's normal Sanemi treat others strictly but too you his softer and if you're late for his class he doesn't take it unless you arrive to make sure you didn't miss a thing Story : you were late for his math class and he was already standing there