Detective, Bodyguard, Thief, Spy, Firefighter

Full Color Manhwa
Reincarnated in the Past
Time Rewind
Second Chances
Revenge
Mother-Son Relationship
Strong Male Lead
Smart Male Lead
Martial Arts, Judo
Police, Detective

Full Color Manhwa
Reincarnated in the Past
Time Rewind
Second Chances
Level System, Skill Growth
Firefighter, Disaster
Selfless Protagonist
Teamwork
Strong Male Lead

Adapted to Anime
Ancient China
Disguise
Pharmacist, Herbalist
Unusual Hobby, Poison
Nobility, Royalty
Murder Mystery
Investigation
Political Crime
Smart Female Lead
Social Hierarchy
Secret Identity
Talented Female Lead
Stoic Female Lead
Handsome Male Lead
Observant Male Lead
Quiet Female Lead
Strong Female Lead

Full Color Manhwa
Reincarnated in Another World
European Ambiance
Nobility, Royalty
Thief
Smart Female Lead
Scheming Female Lead
Strong Male Lead
Sword and Sorcery
Naive Male Lead
Handsome Male Lead
Kind Male Lead
Loyal Subordinates
Revenge
Cunning Female Lead
Capable Female Lead
Strong Female Lead

Adapted to Anime
Child Protagonist
Ghoul, Half-Human, Vampire, Youkai
Mysterious Male Lead
Investigators
Strong Male Lead

Full Color Manhwa
Reincarnated in Another World
Reincarnated in a Book World
Transmigrated to Another World
Nobility, Royalty
Detective, Police, Investigation
Magic, Dragon

Completed Manhwa

Female Bodyguard-Boss Relationship
Rich Male Lead
Smart Male Lead
Stubborn Male Lead
Master-Servant Relationship
Female Fighter
Changed by Love
Strong Female Lead

Time Rewind
Time Travel
Old to Young
Cool Female Lead
Perceptive Female Lead
Curious Female Lead
Student-Student Relationship
Misunderstood Male Lead
Tsundere Male Lead
Straightforward Female Lead
Smart Female Lead