Time Hollow is an adventure video game developed and published by Konami for the Nintendo DS platform. Released in 2008, the game follows the story of Horo Tokio, a high school student who acquires a mysterious pen that allows him to alter the past by creating temporal holes. These changes in the past have significant impacts on the present. The game is known for its compelling narrative, hand-drawn animation style, and engaging puzzle-solving mechanics. Time Hollow combines elements of sci-fi and mystery, making it a unique example of the visual novel genre.