 Volcanic eruptions, earthquakes and tsunamis rock Japan, starting from southwest to northeast, affecting a large-scale evacuation now underway.As the economy collapses, the government declares a state of emergency but acting Prime Minister Kyosuke Nozaki announces that the nation will take five years to sink.Because of Nozaki's indifference to the situation, Takamori runs to Tadokoro's laboratory, where he proposes using experimental "N2" explosives drilled into the crust to separate the land from the megalith pulling it down.