"Kōtarō Katsuragi: The Last Survivor" is a Japanese manga series that follows the story of Kōtarō Katsuragi, a young boy who finds himself in a post-apocalyptic world. As the last human survivor, he navigates through a desolate landscape filled with dangers and challenges, seeking to understand what happened to humanity. The narrative explores themes of survival, loneliness, and the quest for meaning in a world devoid of life. Throughout his journey, Kōtarō encounters various creatures and remnants of civilization, which shape his understanding of the past and his place in this new reality.