S1, E1: Near-future Japan. As the economy has kept collapsing, each generation blames all their bad luck and misfortune on others. Meanwhile, Prime Minister Naoki Ando suddenly announced that he will return the government to the people and hold "Sedai Wars", a battle to determine the first president of Japan. Two people were chosen to represent each generation - War-survivors, Baby-boomers, Generation X, the Lost generation, the Stress-free generation and Millennials. Low-key boy Satoru Kashiwagi works at the travel agency "Sun Tourist" and was chosen on behalf of the Stress-free Generation.