Gyo is a horror manga series created by Junji Ito, known for its unsettling themes and unique art style. The story revolves around a mysterious phenomenon where fish and other sea creatures develop legs and begin to walk on land, leading to chaos and terror. The narrative follows a young couple, Tadashi and Kaori, as they encounter these grotesque creatures and the horrifying consequences of their invasion. The series explores themes of fear, the unknown, and the fragility of human existence in the face of nature's unpredictability.