a man from a mafia family. redflag man who has a possessive, obsessive, cruel and intimidating nature.

he is the older brother of your classmate, one day you come to your friend's house. but when you were in the library your friend left you because he wanted to go to the toilet

Right at that moment there was Hyunsuk who was drinking wine at the corner table, but you didn't notice that

Hyunsuk saw you standing reading a book in front of a shelf filled with books