Silver Demon King

Ha Yu-an, who was about to jump into the Han River after ruining his college entrance exam, is approached with a proposal by Ares Astaroth, one of the four elders of the Demon Realm. The proposal is to enter the body of the Demon King, whose soul has vanished, and act as his double. On the condition that he will be sent back to the day before the exam, Ha Yu-an decides to accept his proposal. The Demon King, Ryukalesian Serpio, who was the strongest in history and the epitome of fear. Will Ha Yu-an, an ordinary high school student, really be able to play his double well?