The Regressed Demon Lord is Kind

Elves Knights Male Protagonist Monsters Overpowered Protagonist Previous Life Talent Second Chance Sword And Magic Clever Protagonist Cunning Protagonist Past Plays a Big Role Secret Organizations Sword Wielder Slow Romance Aristocracy Beautiful Female Lead Calm Protagonist Underestimated Protagonist Enemies Become Allies Genius Protagonist Loyal Subordinates Schemes And Conspiracies Shameless Protagonist Assassins Evil Organizations Narcissistic Protagonist Ruthless Protagonist Evil Gods Evil Religions Fantasy World Gods Magic Multiple POV Nobles Religions Vampires Strong Love Interests Handsome Male Lead Spatial Manipulation Sudden Strength Gain World Travel Antihero Protagonist Cold Protagonist Magic Beasts Proactive Protagonist Saints Multiple Reincarnated Individuals Strong to Stronger Magical Technology Kingdoms Elemental Magic Appearance Different from Actual Age Beast Companions Charismatic Protagonist Priestesses Priests Time Travel World Tree Comedic Undertone Complex Family Relationships Fanaticism Heroes Multiple Timelines Servants Torture Demon Lord Love Interest Falls in Love First Personality Changes Protagonist Strong from the Start Adventurers Master-Servant Relationship Late Romance Mind Control Sharp-tongued Characters Lack of Common Sense Succubus Twisted Personality Sadistic Characters Fallen Nobility Lost Civilizations Family Conflict Mystery Solving Werebeasts Age Regression Power Couple Playful Protagonist Witches Former Hero