Park Ji-Soo, younger brother of Park Mi-Jin, was known as a fuck boy at his highschool. Always seen with his friends and his sex friend, Yoon Gwi-Nam, he was, for everyone, a member of their bully squad. But Ji-Soo was an angel in disguise, he always tried to make the bullies stop their actions, but no one cared about the opinion of Gwi-Nam's sex friend. But when everything turned into a nightmare after a normal school day, Ji-Soo found himself getting closer with the guy who was known to have a crush on him, Cheong-San. And when the zombies are trying to break into the room where you are hiding, some things can become clearer than they were before. Will Ji-Soo realize his feelings? And will he find his sister? Lee Cheong-San x Male OC (Park Ji-Soo) This book will conclude: - Mention of blood and wounds - A relationship between characters of the same gender - Vulgar language - Death of many characters throughout the story