A world where yesterday's hero becomes today's demon, and I've woken up inside the youngest son of a house fated to fall.
Seinen
Alchemy
Anti-Hero
Apocalypse
Aristocracy
Artificial Intelligence
Beastkin
Betrayal
Blacksmith
Clones
Contracts
Corruption
Cunning Protagonist
Curses
Dark Fantasy
Demi Humans
Demon Lord
Demons
Dungeons
Dwarfs
Elves
Empires
Familiars
Game Elements
Game World
Gamers
Gore
Hidden Identity
Kingdom Building
Knights
Loyal Subordinates
Magic
Male Protagonist
Medieval European Fantasy
Monster Tamer
Monsters
Multiple Pov
Nobles
Orphans
Poisons
Politics
Possession
Royalty
Saints
Schemes And Conspiracies
Skills
Spirits
Swords And Magic
System Window
Tragic Past
Training
Transmigration
Transported into a Game World
Undead
Weak To Strong
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