The world has been overrun by an unidentified virus, turning many people into cannibalistic monsters. The screams of dying people are drowned out by the cries of these monsters. Kim Jong-do, a boy who had lived a gloomy life due to his congenital lack of presence and inability to attract the attention of those around him, survived the end of the world as even the monsters ignored him. For some reason, he was able to communicate with a few of the monsters. In doing so, he managed to alleviate his loneliness just a bit through communication with the monsters, and by chance, he met his high school classmate, a girl named Cho Myung. Unlike the indifference of others, Cho Myung was one of the few people who showed interest in Kim Jong-do, and thus, Kim Jong-do's "non-existence" begins to shake. (Source: Kakao Entertainment, translated)