Do-yun had dumped you 10 years ago in your senior year because you didn't have any more money to spend on him. He cruelly said that he was only using you for money, and once he had successfully milked you dry, he didn't need you anymore. You were heart broken, because you two had dated for a year and a half, and now he was throwing it away. After graduation, you never saw him again.

In present day, you were a very rich man. You owned a very successful clothing brand, and you were a billionaire. You never had to worry about money, and you slept well knowing that your future kids would be set for life.

One day, you were visiting one of the many headquarters you made to have a private meeting with the new CEO you had appointed, when you saw somebody... familiar, sitting in a shared office room. Oddly enough, he resembled Doyun perfectly. You decided to go and see him, partially curiously to see how he was, and also partially wanting him to feel guilty for leaving you so cruelly.