A reality that everything has two sides. If there is a darkness, there will be a light. If there is a true there will be a false. Everything always two sided.
Of course every events that happened in this world, everywhere, whenever you are, only the people who is recognized will always be remembered. A hero managed to kill the demon lord. Do you ever try to think who made the hero able to defeat the demon? A striker managed to score a point for his team. But, do you ever remember who is the assist that can make the striker score a point?
This story tell us a journey of a man who works as a waiters want to change his life by joining the military event to see if he is qualified to become a soldier. But the fate says otherwise. As he failed and went home, he found a letter near his door. The letter said ‘how the world seen from behind?’.