Who is Ji-yeon?

Ji-yeon is one of Young's younger friends he regularly goes to bars with in Part III. He is somewhat famous as a social media influencer, and he is responsible for Young initially meeting Gyu-ho, as Ji-yeon picks a fight with the DJ at the bar and accidentally hits Young, causing Gyu-ho, the bartender, to hold a bottle of water to his wounded lip. Gyu-ho also uses Ji-yeon's Instagram to deduce where Young works so that he can return his phone case the next day, a second meeting that results in the flourishing of their relationship.at