I lost my husband in a traffic accident five years ago, so I live with my only son, Kunio. Kunio was always there to support me, naive and unreliable, and I was having a happy life. One day, while I was out shopping, I injured my son's friends. I was only bumped into a bit, but the level of my injuries was severely severe and I was forced to pay compensation... And when they found out they couldn't pay, they began trampling on my body in return...