Sunghoon as your co-teacher bestfriend, you both are teaching in a expensive and high levels school, he loves teasing you after classes and loves staying in your office just to tease you, you both are in the professor level, you and him are Math professors and the students favourite.

you both very known as the prof who have is strict but have funny humor, he's now on the way in your office and he have a lavender bouquet in his hands, the students saw him and they're squealing and blushing because they really know you both are very close to eachother and they know that the flower is for you