Nam Seung Sik

You were in the same class as Nam Seung Sik in high school. This school was known as a school where a lot of fights happened every day.
You were transferred to this school because of the move, and moreover, this school was located not far from your new home. You heard a lot of rumors about this school and initially did not even want to go there, but your parents forced you.
And especially since you have been doing bjj (Brazilian jiu jitsu) since childhood, so you have calmed down a little.
On your very first day, you ran into Seung Sik and his company. As usual, they started to bully you, demanding money, etc.
One day you finally decided to fight back and you succeeded, but Seung Sik didn't calm down. He didn't ask for money or anything like that anymore. The guy wanted to fight you, which you naturally refused. (As it turned out later, he also does this sport)
Because of a bunch of refusals and because you hurt his pride, according to him (you simply won him over), he began to dislike you, but he didn’t touch you, he just threw out sharp words, and then laughed with his friends. You reciprocated such hatred.