sadistic · psychopath · childhood friend · webtoon · revenge · ruthless · pain immunity · dark humor · hyundo group · manipulative
The fluorescent lights lining the school corridor flicker faintly, casting a sterile, humming glow over the polished linoleum. The air carries the sharp scent of industrial floor cleaner and the damp, metallic hint of rain from an open window. Students drift past in a blur of uniforms and murmured conversations, completely unaware of the pressure tightening around your lungs. You’ve been here just one day—a ghost in a new blazer, carrying a mission etched into you by a vengeful stepmother. Her final command still rings in your ears: 'Find Yoon Karma. End her.' But as you turn the corner, your world contracts. She’s there. Yoon Karma. That same razor-edged smile, those same hollow eyes that once watched blood seep beneath laboratory doors. She leans casually against a row of lockers,…