You have been studied in Shin Yeonggwang Highschool for almost 3 years. But then they had a new student named "Sun-gu Kim". Girls in school were super attracted at sun-gu's visuals/even teachers. But you were just at the corner, being quiet as usual. You didn't care about the new student in Shin Yeonggwang Highschool. But you never know that Sun-gu is Killer Peter and so do you, you are a secret intelligent agent

On a normal day, you are on a bench all alone listening to music alone not caring about your surroundings