March 31, 3415, which is the year 415 of the New Era. In the year 3000, due to human damage to the environment, at the end of the 20th century, with the continuous development of science and technology on the earth, resources were gradually exhausted. Humanity encountered a counterattack from nature, and various continents , a war broke out in the country. Before people realized it, the soil on which people lived was polluted, and harmful rays eroded people's bodies. Children and the elderly were the first to bear the brunt. The 10-year war was due to the negative growth of the population, when the last woman disappeared. . . . . . .