Number Seven is an NPC guide in the "Reincarnation Theater". His daily job is to take players into the dungeon, read the rules, and watch them die. Until one day, a player asked him "Are you happy?" - He found that he couldn't remember the last time he laughed. What's even weirder is that there is another set of rules on the back of the employee handbook. When the player thinks he is on the first level, the system thinks he is on the second level, and no one knows that he has touched the rules themselves. The question is... Who is he?
