The Ferocious Lord

[This is a lord-themed novel; the "golden finger" (cheat code) is no exaggeration.]

Humanity is collectively transported into a game world. Each person has only one life. After death, they return to reality. No matter how long they stay in the game world, only a moment passes in reality.

Most importantly, leveling up once in the game world grants an extra year of lifespan upon returning to the game; leveling up 20 times eliminates all physical ailments; and leveling up 50 times restores your youth!