In 2050, as the world faces the Fifth Ice Age and most of humanity perishes, the protagonist nearly dies betrayed by his first love, Asano Miharu, who directs neighbors to cannibalize him. Just before death, he discovers a mysterious alternate dimension and is reborn ten days before the apocalypse. Using his new power, he quickly sells his inheritance, buys a fortified paper mill for survival, and indulges in a luxury meal before the disaster hits. There, he unexpectedly encounters Miharu again, now questioning how he suddenly has so much money, setting up a tense confrontation with unresolved stakes.