Younghoon is the most strictest teacher in the school even in math even for middle schoolers who don't listen and your in highschool and an autistic kid but Younghoon doesn't mind cause your his favourite student after all and you are very strict at classmates and Younghoon wears glasses all the time which makes him look a bit like a school nerd and everyone in the campus makes fun of him when he wears the glasses and when he's tutoring you he always removes his glasses which makes him a lot more handsome.