Being a young boy desperate to complete high school and pay off the debt his mother owned; Kai never expected to run into the mafia lord known as the "DEVIL". "DEVIL" A man who has no emotions. The sadistic devil who cares for nothing else in this world but to bathe in the blood of his enemies. Just one meeting with him and his fate was rewritten. He was not only brought by the devil, but he was now possessed by him. Now, Kai is on the run, from the same devil who is determined to have him back where he belongs, back in his bed and on chains.

jeongguk is a teenager completely out of control and taehyung is hired to teach him how to behave. How will taehyung handle jeongguk? Will there be more problems with jeongguk or can he actually be tamed.