Demon, God, Ghost, Action, Fanstay with a Male Lead

Full Color Manhwa
Reincarnated in a Book World
Transmigration
Magic, Demons
Secret Identity
Nobility, Royalty
System

Full Color Manhwa
Reincarnated in Another World
Terminal Illness
Ghost
Master-Disciple Relationship
Weak to Strong
Martial Arts, Cultivation
Father-Son Relationship
Older Brother-Younger Brother Relationship
Smart Male Lead

Full Color Manhwa
Arrogant Male Lead
Hard-Working Male Lead
Split Personality
System, Game Elements
Demon Hunter
Dungeon, Monster, Demon, Vampire
Strong Male Lead
Smart Male Lead
Sword and Sorcery
Travelling Between Worlds

Full Color Manhwa
Returning from Another World
Demon King
Demon Powers
Half-Demon Male Lead
Food Lover
Secret Identity
Level System
Badass Male Lead
Cunning Male Lead
Ruthless Male Lead
Strong Male Lead

Adapted to Anime
Transported to Another World
Transported to a Demon World
Adoption
Grandfather-Grandson Relationship
Doting Guardian
Secret Identity
Friendship
Magic School
Magical Creature
Kind Male Lead
Pure-Hearted Protagonist
Weak to Strong

Full Color Manhwa
Reincarnated in the Past
Time Rewind
Second Chances
System, Actor
Fox Spirit
Human-Nonhuman Relationship

Full Color
Reincarnated in Another World
System
Ghost, Demons
Martial Arts, Cultivation
Training, Weak to Strong
Strong Male Lead

Full Color Manhwa
Sudden Acquisition of Power
Sudden Strength Gain
System
God, Goddess
Weak to Strong
Magic, Special Ability
Monster Hunter
Sword and Sorcery
Travelling Between Worlds
Kind Male Lead
Strong Male Lead

Summoned Into Another World
Magic, Cheat Skill
Appearance Changes
Weak to Strong
Animal Characteristics
Animal Transformed into Human, Fox Girl
Sword and Sorcery
War Between Countries
Human-Nonhuman Relationship
Demon-Human Relationship
Married Couple
Strong Female Lead
Strong Male Lead