Custom Made Demon King

Tags: Angels, Appearance Changes, Beast Companions, Beastkin, Beasts, Calm Protagonist, Cautious Protagonist, Charismatic Protagonist, Charming Protagonist, Cheats, Confident Protagonist, Contracts, Cunning Protagonist, Dark, Demon Lord, Demons, Dragon Slayers, Dragons, Evil Gods, Evil Protagonist, Evil Religions, Evolution, Fairies, Fallen Angels, Fanfiction, Fantasy World, Game Elements, Gate to Another World, Goddesses, Godly Powers, Gods, Heaven, Hell, Hidden Abilities, Hiding True Abilities, Hiding True Identity, Humanoid Protagonist, Interdimensional Travel, Magical Space, Male Protagonist, Manipulative Characters, Monster Society, Multiple Identities, Multiple Realms, Mythical Beasts, Mythology, Overpowered Protagonist, Parallel Worlds, Parody, Pets, Priests, Proactive Protagonist, Protagonist Strong from the Start, Protagonist with Multiple Bodies, Reincarnated as a Monster, Reincarnation, Romantic Subplot, Ruthless Protagonist, Selfish Protagonist, Souls, Spirits, Strength-based Social Hierarchy, Strong to Stronger, Summoning Magic, System Administrator, Unreliable Narrator, Vampires, Wars, Weak to Strong, Werebeasts, World Hopping, World Travel, World Tree, Zombies