[[quoteright:212:http://static.tvtropes.org/pmwiki/pub/images/7-seeds-1107980_6890.jpg]]

->''When you wake up, you don't know if you're in heaven or in hell, but regardless, you wish to strongly keep surviving.''

In the near future, scientists discovered that a meteor was headed towards earth and that if it hit it was expected to wipe out almost all life. World leaders met and tested a number of countermeasures. In the worst case scenario, if none of the countermeasures worked and the human race died out entirely, they created a final project, "7 Seeds". Each country took young and healthy people and put them in a cryogenic sleep: when conditions on earth had become safe enough to live in again, they would be released.

In Japan, the 7 Seeds project was organized into five teams of seven people: Team Winter, Team Spring, Team Summer A, Team Summer B, and Team Fall. The story begins some unknown number of years in the future, when Team Summer B wakes up and learns that their entire world has been destroyed and that evolution has begun to repeat itself.

''7 Seeds'' is thought-provoking manga written by Yumi Tamura, better known for writing ''{{Basara}}''. It's mostly adventure, science fiction, and horror, but it has touches of romance. The story is also notable for its large cast of varied characters. There is no single main character, or even main team: instead, the story regularly switches between teams, usually with one viewpoint character per team.

In 2007, the series won the Shogakukan Manga Award for shōjo manga.
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!!This manga has examples of:
* ActionGirl: Hana and Botan, among others.
* AfterTheEnd: The majority of the story takes place after a meteorite has destroyed most life on Earth and evolution has begun to repeat itself.
* ApocalypseHow: It is a Class Four.
* ApocalypticLog: [[spoiler: Mark's]] journal in one of the ruined shelters.
** What makes it all the more sad was the fact that [[spoiler:had it not been for the disease or the flooding]], it would have been a complete success or at least lasted much longer.
* AnyoneCanDie: Poor [[spoiler:Team Winter. And Team Summer A candidates]].
* AxCrazy: Team Summer A becomes a bit unhinged after the final test, and end up [[spoiler:killing their guide, Unami]].
* BerserkButton: Do not try to hurt Hana in front of Arashi. He will hurt you.
** Also, do not make comments about Ango's friends. He will attack you.
* BewareTheNiceOnes: Arashi, the sensitive nice guy, nearly killed some guys who threatened his girlfriend before the story began.
* BigFriendlyDog: Aramaki's dogs.
* BreakTheCutie: Happens to several characters, but especially Ango.
* BrokenAce: Again, Ango.
* ButWhatAboutTheAstronauts: Aramaki speculates that some (possibly Americans) might have escaped to the Moon and that their descendants might be spying on them.
* CelebritySurvivor: Two variants. First, a few of the team members were somewhat famous- Takahiro and Fubuki were both fairly well-known baseball players, for example. Second, [[spoiler: in the "Ash" arc, several entertainers, including IdolSinger Maria Miki, are included in the underground shelter, to keep the other people there calm and content.]]
* CharacterDevelopment: As time goes on, the characters grow and develop into fairly competent teams and more sides to several characters are shown.
* CrapsaccharineWorld: Ryugyu in the Ash arc is a large impact shelter disguised as a luxury resort.
* CrapsackWorld: While the post-impact world gives Australia [[EverythingIsTryingToKillYou a run for its money]], life in the times leading up to it is implied to be rather unpleasant.
* CryonicsFailure: What happens to three members of Team Winter.
* CyanidePill: All of the team leaders were given poison so they could kill themselves and the rest of the team if they awaken in situations that are unlivable.
** It's revealed in the "Ash" flashback that [[spoiler:Hana's father]] had similar insta-death pills on hand for his confidants in the shelter.
* DeadGuyJunior: Takahiro names two puppies after [[spoiler: his dead teammates Mitsuru and Fubuki.]]
* DeathByDisfigurement: [[spoiler: Ukai, who loses an eye before dying. The teachers' behavior makes it pretty clear that any Summer A candidate who got such a severe injury was going to die, and had no chance of being included in the team.]]
* DeathWorld: The post-impact world (or at least what's left of Japan anyway) seems to be filled with all manners of flora and fauna out to kill you.
* DrivenToSuicide: [[spoiler:Arashi begins to feel that it is hopeless that he will ever reunite with Hana and tries to drown himself.]]
* DueToTheDead: [[spoiler: Koruri and Ango take time during the Final Test to cover Mayu and Hyo's bodies with rocks.]]
* DwindlingParty: Poor Team Winter...
* EasternZodiac: Wood carvings of the zodiac are used to give the Summer A candidates clues as to when the next part of the final test will happen.
* FlingALightIntoTheFuture: Deconstructed, the manga going long ways to show both the effects this has on the people involved and the sort of sacrifices needed to pull this off.
* FriendlessBackground: Before she came to the future, Natsu's closest emotional support was her ''kitten''.
* FriendshipMoment
* FriendToAllLivingThings: Gengoro is very good with animals and is top in the animal class.
** [[spoiler: Deconstructed like a lot of [[SlidingScaleOfIdealismVersusCynicism other happy tropes]] when the [[TearJerker Final Test]] comes along. Now he doesn't think that he deserves to be such a thing.]]
* GivingSomeoneThePointerFinger: Semimaru to Arashi, after Arashi referred to Semimaru's hometown as "the place with all the eels."
* TheGreatestStoryNeverTold: Had the characters never found [[spoiler:Mark's corpse and journal]], the tragic, bittersweet story of the Ryugyu shelter would have been lost forever. And they would have likely been unaware of the reason ''why'' said shelter ended up that way.
* HeroicBSOD: About half of the members of Team Summer A get this after they are selected. The other half just look stunned/angry/murderous.
* HeroicSacrifice: [[spoiler:Yanagi]] burns himself alive to save the rest of his team.
* HopeSpot: The Ryugyu shelter is revealed to be part of a network of others scattered throughout Japan. [[spoiler:But due to the fact that most if not all were implied to have eventually been cut off from each other]], odds are that maybe one of them may still have people living there.
* HumanPopsicle: All of the characters were cryonically frozen before the meteor hit.
* HumansAreBastards: Holy high-flying Hell, what ''wasn't'' done in an attempt to keep humanity alive?
** To be fair, some of the more desperate and abhorrent acts were meant to be last-ditch emergency measures in the event something went wrong in the shelters. [[spoiler: Like in Mark's.]] That said, there really isn't much excuse for [[spoiler: killing the failed Summer A candidates... especially the ones like Nobara, who was a kid and died for ''having poor eyesight''.]]
** The modus operandi for "recruiting" most of the 7 Seed Teams involve taking candidates against their will ''without ever knowing about it'' until they woke up
* IdiosyncraticEpisodeNaming: All the chapters in the Team Summer A arc have the titles of classical music pieces.
** Those of the Ash arc are based on old movie and book titles such as ''Literature/OnTheBeach'' and ''Literature/WutheringHeights.''
* IWillFindYou: Hana and Arashi.
* JerkAss: Most of the teachers of the Summer A candidates, but especially Unami.
* JerkWithAHeartOfGold: Semimaru and Ryou can seem incredibly jerky but they have hidden soft sides.
* JustBeforeTheEnd: The flashbacks largely take place at some point or another before the Impact actually occurs. [[spoiler:Mark's tale in the Ryugyu arc in fact starts off ''a few days'' before the Impact happens.]]
* KillEmAll: [[spoiler: All Team Summer A candidates are killed except the top seven.]]
* KillerRabbit: Team Summer B encounters some cute, fuzzy rodents. Then it turns out that half of the rabbits are carnivorous monsters that try to eat them and the other half are prey. Oddly enough, it's one of the few serious examples of this trope.
* LookOnMyWorksYeMightyAndDespair: Seems to be the predominant theme regarding the relics of human civilization. The Ryugyu shelter in the "Ash" arc in particular was touted as a marvel of engineering and technology. By the time the Teams find the complex, it's just barely functioning, with the structure's integrity hanging by a thread. [[spoiler:And that's not getting to what happened with the people...]]
* ManEatingPlant: Natsu and Arashi run afoul of these early on, but are rescued.
* ManipulativeBastard: Pretty much every adult in this series is a terrible person, but the teachers are the school are the worst.
** The exception or subversion seemed to have been [[spoiler:Mark and the others in his shelter]]. Too bad they're long dead. Botan seems to be the only nice adult still alive.
* TheMedic: Two of them- aspiring doctor Fujiko of Team Spring, and Ban of Team Summer A, who is top in the medical classes. Although the latter is unhappy with his abilities [[spoiler: due to having been unable to save many people during the Final Test and later finding out that because he and the rest of Team Summer A were frozen almost two decades before the rest of the cast, his methods are now out of date.]] His methods do still work, though.
* NoNameGiven: The crew of [[spoiler:the Fuji ship]] are ''at best'' known only by what their professions must have been back when they were still alive. Odds are, their real names are lost to time.
* OfficialCouple: [[StarCrossedLovers Hana and Arashi]], devoted to each other despite never quite being able to actually find each other. Also Kurumi and Ryuusei of Team Autumn.
* ParentalAbandonment: The parents of the characters sold them to the government.
** Subverted with [[spoiler:Hana's]] parents at least. It's revealed that they sincerely regret their involvement in the 7 Seeds project but still believe that it's for the best. They also take consolation that her boyfriend's also there.
* PleasePutSomeClothesOn
* PosthumousCharacter: Everyone in the ApocalypticLog, naturally. (They get a whole arc.)
* PuppeteerParasite: [[spoiler: The mantis larvae that control Yanagi. The Acari X also seem to have tendencies in the same direction.]]
* RagnarokProofing: [[RuleOfCool Plant-animal hybrid]] [[EverythingsBetterWithDinosaurs raptors]] and [[BigCreepyCrawlies huge flesh-eating silverfish]] have had time to evolve, yet the Shinjuku skyline is still discernible despite being partially submerged in saltwater. Then there's the issue of the functioning boat and edible rice in the shelters...
** The shelter containing [[spoiler:Mark's corpse and journal]] is shown to still be somewhat intact with functioning electricity and even automated speakers. Although the reason it's that way is tied closely to the aforementioned ApocalypticLog.
** Played with in the case of the subway line leading towards the shelter. At first glance, it ''looks'' pristine. But years of neglect and saltwater intrusions had not only weakened the columns but also reduced the subway car's strength to the point that it crumples just by simply ''touching'' it.
** The Fuji Stations play this straight on purpose: they were deliberately designed to stay preserved indefinitely.
* RagtagBunchOfMisfits: Team Summer B. Chosen deliberately in case the attractive, intelligent, and socially well-adjusted members of the other teams didn't have the strength to survive.
* RapeAsDrama: [[spoiler: Ango tries to make Hana "pay with her body" since her father was a SinkOrSwimMentor. Fortunately, [[IceQueen Ayu of all people]] [[BigDamnHeroes steps in]].]]
* RecruitTeenagersWithAttitude: Again, Team Summer B. [[spoiler: Specifically engineered]] in Team Summer ''A''.
* RuinsOfTheModernAge: Teams Summer B and Spring can't believe they're in Japan until they encounter these.
* [[TownWithADarkSecret Shelter With A Dark Secret]]: The "Ash" arc is about this. Especially since it's revealed that the whole [[spoiler:long-dead]] place is basically a Japanese version of [[VideoGame/FalloutNewVegas Vault 22]].
** The Fuji ship is this crossed with RoomFullOfCrazy. [[spoiler:It's revealed that just about everyone onboard went insane one way or another. Add in a veritable supply of weapons and ammo...]]
* ShipTease: Given the fact that these guys are here to keep humanity alive, this was bound to come up. Some of the less expected ones include [[spoiler: [[RomeoAndJuliet Haru and Korui]], [[MayDecemberRomance Ayu and Aramaki]], and now Ango and Natsu]]
* ShrinkingViolet: Natsu can barely bring herself to shout that she has found water.
* SinkOrSwimMentor: Team Summer A's teachers, [[TraumaCongaLine to their eventual horror]].
* SnowMeansDeath: [[spoiler:Mitsuru from Team Winter commits suicide this way, after Fubuki dies.]]
* SoBeautifulItsACurse: Ayu, aka Madonna, is harassed by other female classmates because of her beauty. She's less whiney about it than most female examples of this trope, but it does come up.
* StarCrossedLovers: Hana and Arashi. They were dating before being frozen and are looking for each other in the hopes that both will still be alive. But events seem to conspire to keep them apart.
** Especially now that [[spoiler: Hana is [[NeverFoundTheBody quite likely dead]].]] To add insult to injury, the guy who [[spoiler: [[RapeAsDrama tried to rape her]] is now hanging out with Arashi and the rest of his team.]] Neither of the latter parties [[DudeNotFunny have a clue about the link.]]
* TheStoic: Ryo and Nijiko, both of whom are calm and hardly show any emotions.
* SurvivalistStash: The Fuji Stations.
* TemporalThemeNaming: All of the characters have names that mean things related to the season of their team.
* TitleDrop
* TooDumbToLive: Many of the Summer A candidates are incredibly stupid, especially considering all of the survival training they've had.
** Justified with several, who were just coasting and treating it like a game.
* TraumaCongaLine: In many ways, [[SerialEscalation the whole series]]. Having it start with EverybodysDeadDave and showing us what's left can do that. And then there's always Team Summer A's Final Test...
* TwentyMinutesIntoTheFuture: The time period just before the meteor strikes and when the majority of the Team Summer A arc is.
** [[spoiler: Subverted with the latter. By the time they were frozen, Hana had just been born, so they're hilariously outdated. [[BreakTheHaughty This isn't really taken well.]]]]
* TwistedChristmas: [[spoiler:The very last day of the shelter was on December 25, according to [[ApocalypticLog Mark's journal]].]]
* TyphoidMary: The scientists in the underground shelter theorize that one of these is responsible for the spread of [[spoiler: Acari X]]. [[spoiler: It's Maria.]]
* UtopiaJustifiesTheMeans: Including shipping unwitting civilians into a post-apocalyptic uncertain future, [[spoiler: culling the population]] to keep the underground hideouts alive, mentally scarring 17-year-olds as a final test... And then there's the matter of how we meet [[MeaningfulName Fall]]...
* WeHardlyKnewYe: [[spoiler: Nobara; also, Mutsuki and guide Sayuru of Team Winter.]]
* WellIntentionedExtremist: Basically everyone in charge of Summer A, but particularly Kaname and Takashi.
** The government response to the Impact in general is this. So long as some semblance of human civilization survives, the authorities would do ''anything''.
* [[WhatTheHellHero What the Hell, Authority?]]: A frequent theme, most often a response to the above.
* WhatTheHellHero: [[spoiler: Ango and Ryo]] are eventually called out on [[spoiler: the former trying to rape Hana and the latter trying to kill her and Haru.]] Yay, exile.
* [[WhyDidItHaveToBeSnakes Why Did It Have To Be Be Bugs]]: Arashi and Semimaru hates bugs. And guess what! The first island their team finds is infested with giant carnivorous cockroaches and other insects!
* YouCantGoHomeAgain: The place where you were born might still be there, it just probably is in ruins and your entire family and all of your friends are dead.
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