It drops you in the water before you know a single name: Summer B wakes up mid-shipwreck, spits out seawater, and immediately starts dying of things anime usually treats as scenery. No power-ups, no friendship speech, just Natsu crying because she is genuinely useless and knows it, Semimaru mouthing off to cover the panic, Arashi burning every calorie he has on the chance Hana is still alive somewhere on this ruined coast. Botan hands out the truth in doses because the full picture would break them. Then the show cuts to Summer A, kids raised in a shelter to be assets instead of people, and you understand why the survival test broke something in Ango that never healed. Yes, 170-plus chapters of Yumi Tamura got shoved into twelve episodes and it shows. It still lands the part where competence is the only mercy anyone gets."
Humanity saw the meteor coming. Rather than surrender to extinction, world governments enacted the Seven Seeds project: cryogenic vaults containing young people selected to repopulate Earth after catastrophe. When seismic sensors confirm the world has stabilized, five groups of seven awakened survivors find themselves scattered across a transformed landscape they don't recognize. Nature has evolved into something hostile. Resources are scarce. The groups must navigate ravaged terrain, unpredictable weather, and threats both natural and human while searching for the safe zones their creators promised existed. Survival becomes secondary to questions that gnaw at the awakened: Why were they chosen? What really happened during those frozen years? Can they trust the guides who carry poison around their necks, supposedly as mercy? As the groups encounter each other and remnants of civilization, bonds form and fracture under the weight of impossible choices. The series balances visceral action and genuine horror with quieter character moments, building a mystery about what the government truly intended for its frozen specimens.