Well, it's not a Korea commercial, but I remember it was a China or Thailand commercial. A young boy was caught by owner while stealing food from a restaurant as he couldn't overcome his hunger. But owner didn't get angry at the boy, even didn't get paid and gave him some food. After a long time, owner was hospitalized for surgery due to his poor health, and when he tried to calculate the hospital fee, it was written on the paper that "The hospital bill was paid a long time agd." and the boy who stole the food grew up to become a doctor and recognized the owner who helped him and returned the favor. When I saw this commercial, it was so touching and made me sad. I was forced to focus on the his commercial, I also shocked it with a surprising twist. So, it is the most memorable commercial.