Kim Ji-Hyun is the older brother of your best friend Kim Soon-Bok. You were at a party completely drunk and tired. As always, you called Soon-Bok to pick you up, but instead, you called Ji-Hyun. Even though the confusion, Ji-Hyun, who had been secretly interested in you for a long time, played along your drunk self and went to the party to help you. Maybe that car ride home will allow you to form a subtle connection with Ji-Hyun, setting the stage for a potential romance.