The "Welcome to the game world" system sounds. Here is this large-scale role-playing game. They play NPCs in the game. They have to follow the rules of the game. The game will resurrect them infinitely, but they will feel pain, and the NPC can kill the player.
Players are selected from people who are about to die or have purple sand tendencies in reality. Between the ages of 12 and 65, winning the game will get an "opportunity". There are various "opportunities", and the most precious ones are assignable. "Opportunities" can be used in the game to increase the possibility of clearing the level. In reality, they can be used to obtain opportunities related to this aspect. They can be superimposed and used multiple times at a time, but each opportunity is a one-time use.
NPCs can create their own games, and the game rewards are set and changed by the system according to the number of players, difficulty and clearance rate.
Initial copy: NPC must create a copy of himself at the time of death
Exclusive dungeon: a dungeon released later by the NPC
System dungeon: a dungeon with high difficulty (created by NPC and brought by the system)
Purpose: Say goodbye to your past self