Action

A former pro gamer who retired due to injury.
    After retiring, I spent my days just playing games…
    Then the game I used to play became reality.
    But I am not a Player.
    [You are the System of planet ‘Earth’.]
    It wants me to register people as characters, but I have no idea what that means.
    For now, let’s just clear it first.
    After all, I know everything about this game.