Mujeingan

In a world where people's memories are manipulated to prevent them from experiencing unhappiness, a young man lives as a "memory manipulator." One day, after growing accustomed to this fabricated reality, he discovers that innocent people are being sacrificed to maintain the system's law. Should he preserve this artificial peace or fight to save the innocent? He now begins his stand against the world.

(Source: Naver, translated)

Note: Includes one extra chapter.