In a post-apocalyptic world, a group called the Nemesis infected the country with a contagion that transformed the population into flesh-eating zombies. A mysterious man known as the Undead King tries to fight back with a group of survivors and supernatural creatures called gangshi. A young high school boy finds himself drawn into this fight and struggles to stay alive while also trying to protect a young girl ganshi named Yoo Yoo that was left in his care. (Source: Spottoon)

When Yi-hwan woke up, the world had changed. Zombies craving the blood of the living, Humans running for their lives. But then... *"Why aren't the zombies biting me?"* Unbelievable strength, One eye turned red, just like the zombies, And a strange hunger every time he sees blood. *"What the hell happened to me?!"* (Source: KakaoPage, translated)

His only hope is his own wits! Kang Cheol-Jung, once an ordinary high school student, woke up one day to find himself trapped in a sealed room he’d never seen before. In his confusion, he searched his surroundings and discovered an old MP3 player. A message left on the MP3 revealed the shocking truth: he had been poisoned and had only three hours left to live. Kang Cheol-Jung, who had always been a mystery puzzle enthusiast, draws on the deductive skills he’d honed over the years to search for clues and try to escape the locked room. But theory and reality are two different things. After making one mistake after another, he eventually finds himself in a desperate situation where the poison has spread and he’s coughing up blood. What will be the final clue that catches his eye?! (Source: Naver, translated)