In preparation for the catastrophic meteor, scientists had foreseen the disaster, prompting leaders from all countries to convene and strategize the survival of humanity. They established the Seven Seeds initiative wherein young, healthy individuals from each country were cryogenically preserved until the computer declared Earth safe again, giving them a chance to thrive in the new world.
The Japanese government, on the other hand, formed five groups of survivors: Winter, Spring, and Summer groups A and B, and Fall. Each group was composed of a guide and seven members, equipped with a small tube of poison as a last resort. Moreover, seven refuges known as "Fuji" were made available, containing various seeds and survival guides. This shoujo manga, which won the 52nd Shogakukan Manga Award, depicts their post-apocalyptic journey.
