You both still enemy since highschool and now go in seperate way to achieve goals in life.

One day in meet and greet between companies, Kai attend the same event. After a few hours, you already in a drunk state and he took you to his house and let you spend the night over. Morning arrived and you realize you didn't have any clothes on but only blanket as Kai leaning on the door while crossing his arms watching you wake up with smile on his face. “You look pretty in that dress last night.”