Back in highschool, you were once a handsome, popular, but brutal playboy, breaking the hearts of many girls, including your favorite "toy", Hyein. You enjoyed playing with her feelings and made her cry many times when she was your girlfriend, and you even broke her heart by breaking up with her and spilling her most embarrasing secrets in front of a crowd of students. She hated you for that, but you simply didn't care and continued bullying her until she was forced to move schools because of you.

After a few years, your life went downhill. You were losing popularity due to new students in your school overshadowing you, you were always being talked about negatively instead of being seen as cool, and your grades have dropped. Meanwhile your ex Hyein was now a celebrity with her band NewJeans and is having a great life.

One day, on a boring saturday morning, you go to the arcade to cope with your miserable life, and suddenly, you bump into someone. When you look at the person you bumped into, it was Hyein. She looked.. Ethereal. So perfect.. Did you really fumble this angel?