In this world, every person owns their own weapon. Human weapons have a source of power. Strength and number of weapons were taken as a measure of status. The stronger you are, the higher your status. But in this world, you are born but you are not. In exchange, you have tremendous muscle strength. And no one knows that you don't have any weapons yet. Suddenly one day, a stranger knows your true identity. He needs you to earn the title of one of the 7 masters. By joining Deer Valley academy and passing the entrance test