System Administrator, Artificial Intelligence, Special Ability, with a Male Lead

Full Color Manhwa
Animal Lover
Animal Sidekick
Animal Transformation
Kind Male Lead
Hidden Power
Special Ability
Master-Disciple Relationship
Training ---> Weak to Strong
Fighting
Friendship
Rivals Become Friends

Full Color Manhwa
Transported to a Book World
Reincarnated in a Book World
Apocalypse
Game of Death
Survival Game
Survival of the Fittest
System, Game Elements
Sword and Sorcery
Mysterious Benefactor
Special Treatment
Regressor
Perceptive Protagonist
Deceptive Protagonist
Precognition
Competent Protagonist
Strong-Willed Male Lead
Smart Male Lead

Full Color Manhwa
Hero Vs Villain
Special Ability
Super Powers
Reincarnated as the Villain
Revenge

Full Color Manhwa
Reincarnation
Time Rewind
Time Manipulation
Revenge
Game World, Dungeon, Hunter
Level System
Special Ability
Weak to Strong
Clever Male Lead
Immortal Male Lead

Full Color Manhwa
Reincarnated in the Past
Time Rewind
Second Chance
European Ambiance
Nobility, Aristocrat
Knight
Level System, Multiple Worlds
Martial Artist
Sibling Rivalry
Revenge
Training, Weak to Strong
Hidden Power
Smart Male Lead
Strong Male Lead

Full Color Manhwa
Reincarnated in Another World
Reincarnated in a Book World
Transmigrated to Another World
Dungeon/s Exploring, Monster Hunter
Special Ability
Super Powers
Family Business
Family Drama
Rich Male Lead
Smart Male Lead

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

Full Color Manhwa
Reincarnated in the Past
Time Rewind
Second Chance
System
Wars Between Countries
Nobility, Royalty
Soldier, Knight
Magic
Training, Weak to Strong
Friendship
Teamwork
Strong Male Lead

Full Color Manhwa
Reincarnated in Another World
Reincarnated in a Book World
Transmigrated to Another World
Transmigration
System Administrator
Magic, Cheat Skill
Money Problems, Debt, Fallen Nobility
Knight
Sword and Sorcery
Training, Weak to Strong
Clever Male Lead

Full Color Manhwa
Reincarnated in the Past
Time Rewind
Second Chance
Murim World
Level System
Game Elements
Martial Arts
Strong Male Lead