Summary: In 2030, the world\'s largest cities were destroyed by terrorists manipulating unidentified giant weapons. They called themselves \"Tokoshie\" and destroyed the city with overwhelming power … then disappeared. Twelve years later, in 2041, Tokyo. A transfer student appeared in front of Tsukimi, a high school boy who spends his days closed. From the day I met this boy who was somewhere away from the world, Tsukimi\'s \"life-threatening school life for the survival of humankind\" began!