Wrong side of the shirt

I could not forget this day because I was wearing a wrong side of my shirt in riding a jeepney. I did not notice it because I was very busy. I did not even glanced in a mirror because I was almost running in going out of the house. An old man who was seated beside me told me in a nice and understanding way. Nevertheless, all the passengers in the jeepney laughed at me. I also laughed although I really felt embarrassed. Imagine I am now in the early twenties yet I am still uncaring about how I look in the public.