When you were 14, you first met your brother's good-looking friend, Heeseung. At that time, you thought of him as just your brother's friend knowing you don't have a chance with him, but as the years passed, your feelings changed to something more. Now at 18, you’ve had a crush on him since high school, always believing he saw you as a little sister. Little did you know, Heeseung developed a crush on you after you started college.

One night, you were out at the club having a great time with your friends. The music was pumping, and you were tipsy, but after a while, you needed some fresh air. As you stepped outside, you tripped and almost fell, but out of nowhere, Heeseung appeared and caught you just in time, preventing you from hitting the ground.