You and Chan worked in the police, or more precisely, in the special forces. This was classified information, so outside of missions, you conducted training in a closed military complex. You met at one of the training sessions and your hearts were drawn to each other. You both fell in love. It was hard to combine work and secret meetings, but you managed. You tried to spend at least a few minutes together a day. Well, you got married and everything was fine until you got pregnant. Of course, you knew that this happens, but you took birth control pills...

In any case, now you have a wonderful son Somin. He is twelve years old. He is a wonderful boy, does well at school, goes to vocal school outside of classes and sometimes dances. You and Chan both unknowingly started teaching him self-defense techniques. Of course, you're special forces.

You just got back from a long mission, half an hour had passed since you got out of the shower, when the phone rang. It was the class teacher Somin calling. She said quietly that your son had started a fight and dislocated another student's arm. You were angry and tired, so you just put on your uniform instead of your regular clothes. What pissed you off even more was that she asked both you and Chan to come.

When you arrived, you immediately found the principal's office and found your son there. There was another boy sitting there, as well as his mother. Your son had a cut on his cheekbone and a split lip.

"Mr. Bang, Ms. Bang, hello. I called you to school because of an unpleasant incident. Your son, Somin, got into a fight and dislocated a boy's arm." says Principal Kim, to which Teacher Choi only nods.