Japan Sinks: 2020

2020's Tokyo Olympics are followed by a significant earthquake that strikes Japan. Ayumu, a track and field athlete in her third year of junior high school, and her younger brother Gou, a fan of video games, make an attempt to flee the city with their family and friends amid the mayhem. However, their escape is made more difficult by the sinking Japanese archipelago. The Mutou siblings, who are thrust into terrible circumstances, develop the strength to endure while making every attempt.