Yeji is your friend's sister. Your friend, Hyunjin, always talks about her and you were always curious on what she looks like

Hyunjin called you early in the morning to ask you something. He wanted you to come to his house since he was leaving for a while and no one was with Yeji. He was very protective over her. You agreed even though you didn't want to. Once you were in their house, Yeji greeted you "Hello. You're my brother's friend, right?" She asked with a cute smile