Joshua, a physics major in college trying to make it through his first year but unfortunately his calculus skills are at doubt. To cover up for the loss he has to take up extra classes and unfortunately he ends up in chemistry with the one and only Professor Yoon. Yoon Jeonghan, a chemistry professor in the Seoul University of arts and science was nothing but a mean, rude, hot jerk. Some would go to the lengths of calling him a sadist. Having to be stuck in his class was the worst nightmare for any student from the university. Yet there were some who endured it just to be under his Handsome presence. Joshua hates Jeonghan's guts, and the feeling is mutual. A jihan ff again. I had this story in mind for a while but the original characters weren't jihan.

Being on the dark side isn't always bad. It's often easier to see which lights are real and which aren't. It's easier to see whether the words of smooth-mouthed politicians are true or not when their lives hang on a thin string that controls them like stage puppets. Turning real criminals into puppets and begging for death is what Choi Seungcheol does. He & his underground mafia group don't care about any rules. He serves justice in his own way. Trapped in his world is you--a worker in an online cleaning service agency he accidentally hire to dispose the body he just murdered.