Dae-su would openly admit the fact he liked Jang Ha-ri, Jang Wu-jin’s older sister on the Hyosan High School archery team. Titling Wu-jin his “brother-in-law”, because he was confident he would marry her. And it pissed Wu-jin off.

You were Dae-su’s older sister, 18 years old. During class, Dae-su sat down next to Wu-jin along with the other boys. “Brother in law!” He exclaimed.

Fed up, Wu-jin announced loudly, “Soon I’ll be calling you brother in law when I’m dating your noona.”