I'm the Grim Reaper

The grim reaper. Corruption. Murder. Human trafficking. Legends say that the grim reaper tracks those whose crimes have gone unpunished and kills them. He is always disguised as a normal person, but if you meet his eyes, knowingly or unknowingly, you have 3 days to come clean and correct everything or you'll die.

This thriller/mystery tale tells the story of Jon Tan, a college student who became a grim reaper to seek revenge against the man who murdered his dad. As the original reaper keeps killing people, several crime investigation organizations are on his trail while a mysterious detective guides Jon to his dad's murderer. Both executioners have to cooperate to get what they want.