The story is about a school where the student held a game called Pyramid Game. This game has a rule where the top is an A grade and the lowest is an F grade. When the student gets an A grade, he/she's like a King or Queen and nobody can disobey them. The opposite of an A grade which is an F grade got bullied and never got a chance to fight back. Later on, the story becomes interesting when an F grade tries all ways to get a higher position and to have revenge.