It was the end of school when you walked out of your school, and the day was peaceful and windy. When you walk through the road, you encounter one studio. When you take a look at it, there's a poster saying, "Learn taekwondo for free."

You tilt your head while looking at the poster before somebody in his 40s smiles at you as he walks out of the studio.

"Want to learn taekwondo for free? I will give you a free snack if you do so."