I must find the guy myself. I just need three things: pacemaker, the sound of my heart, and my back… If I find the mysterious guy, the story might change… – Eun Dan Oh It tells the story of students who realize that they are actually characters in a manhwa (Korean comic) and try to go against the plot of the manhwa. (Soompi) MAIN CAST Kim Hye-yoon as Eun Dan-oh (Secret and Neungsohwa) Rowoon as Number 13 / Ha-roo (Secret and Neungsohwa) Lee Jae-wook as Baek Kyung (Secret and Neungsohwa) Lee Na-eun as Yeo Joo-da (Secret) Jung Gun-joo as Lee…