History Manga / DriftingClassroom

* Foreshadowing: Sho’s teacher tells him to lie and say he called his mom, and Sho lied and said she said she was at home. Later on he would be able to “call” her and she was at home. But the call is a psychic link and the reason she could be at home is because Sho and everyone is the future.

* BothSidesHaveAPoint: Sho's mother accuses Sho of keeping dangerous weapons for toys, while Sho accuses his mother of snooping in his desk without permission.

* DisabilitySuperpower: It turns out that Nishi, who is on crutches, is the source of the psychic link between Sho and his Mom.

* ImprobableInfantSurvival: Subverted and played straight. Plenty of children of various ages die, but [[spoiler:Yu, the pre-schooler, doesn't.]]

* Foreshadowing: Sho’s teacher tells him to lie and say he called his mom, and Sho lied and said she said she was at home. Later on he would be able to “call” her and she was at home. But the call is a psychic link and the reason she could be at home is because Sho and everyone is the future.

* FauxActionGirl: Averted, in that Sakiko actually does stuff, although not as much as the others.

* LiveActionAdaptation: The 1987 film.

* AnyoneCanDie: [[spoiler:Ikigaki is the first major death, and then Otsuke, Ishiki, and Shibata all die in quick succession.]]

* MayContainEvil: The mushrooms.

%%* TagalongKid: Yu, the preschooler.

* BittersweetEnding: [[spoiler:The surviving kids don't find a way to go home, but they decide to stay in the ruined future in order to build a new civilization.]]

* AdultsAreUseless: The principal is a complete idiot, Sekiya is pure evil, and [[spoiler:Watahara kills all the others and then begins running over students in his car.]]

* BittersweetEnding: [[spoiler:The surviving kids don't go home, but they decide to stay in the deserted future in order to build a new civilization.]]

* KnifeNut: Otomo gets into several knife fights as the series continues.

A very dark manga (original title: ''Hyoryu Kyoshitsu'') by Kazuo Umezu. It was first serialized from 1972 to 1974 and later made into two different live-action movies: A [[http://www.imdb.com/title/tt0125201/ Japanese one]] in 1987, and an [[http://www.imdb.com/title/tt0163608/ American one]] in 1995.

* InfantImmortality: Subverted and played straight. Plenty of children of various ages die, but [[spoiler:Yu, the pre-schooler, doesn't.]]

* AlwaysABiggerFish: [[spoiler: The mutants talk a lot about how they are better than humanity for only letting the strong survive. They are eventually eaten by a giant monster, along with their own prey, a kind of mutant starfish.]]
* AfterTheEnd: The school ends up in an empty, barren wasteland, with a monument to their disappearance which indicates they've been sent far into the future. [[spoiler: If the film the mutants have is real, the End came about due to pollution and GaiasVengeance.]]

* BigEater: Nakata. Done seriously, unlike the usual comedic usage of this trope. Not only do they have very limited food, but [[spoiler: his eating powers the monster he summons.]]

* ChildrenAreInnocent: The negative aspects of innocence, like naivete, helplessness and panic, are played up a lot more. It's only by shedding their innocence that the kids learn to survive.
* CreepyChild:
** Scar Kid, who decides to kill everybody because he's been infected with the Plague.

* GaiasVengeance: If the film record is to be believed, the end of the world was caused by nature striking back at humanity and its pollution and destruction. [[spoiler: The mutants are apparently an offshoot of humanity that arose JustBeforeTheEnd.]]
* {{Hammerspace}}: How did Mr. Takamatsu put enough streptomycin to cure 400+ students in a single package in a single mummy?

** [[spoiler:The returning Princess says that Mount Fuji is a paradise. It's actually the remains of a theme park ''named'' Mount Fuji Paradise, which is mostly intact but now home to a homicidal robot host.]].

* TheLoad: Nakata. He eats too much, he whines, [[spoiler: he summons a giant monster that kills and destroys, he summons even more monsters that kill and destroy.]] Considering that so many kids die routinely anyway, it is quite annoying that Sho defends him and criticizes the kids that are relieved [[spoiler:when he ends up committing suicide]].
* MayContainEvil: The mushrooms.

* RagnarokProofing: Flip-flopped. Nearly every last trace of human civilization has withered away, except a partially sunken ship in the bed of former Tokyo Bay, and plastic garbage left behind where a river once was. However, several underground structures still remain, including a subway and a ''functioning subway train and film projector.'' There's also the medication hidden in the mummy in the hospital morgue, which apparently survived however long its been there.
%%* {{Retirony}}: Oki.

* SanitySlippage: Sho's mother is portrayed as undergoing this throughout the series, acting increasingly disturbed as the series progresses. Depending on how you view it [[spoiler:the entire series can be seen as Sho's mother's paranoid fantasy, as the entire series is written as if it were a nightmare, she believes that that she is the only one who can save the kids, and she is eventually deified by the them late in the series, showing her to have immense delusions of grandeur.]] If you subscribe to this theory, then [[spoiler:the bomb at the beginning of the series could have been a conventional weapon because [[UnreliableNarrator you can't trust Sho's mother's recollection of the events.]]]]

** [[spoiler:The explanation for the time travel is that Otomo planted a stick of dynamite in the teacher's lounge. The dynamite transported the school into the future when it exploded. Apparently it was magical dynamite. It makes as much sense as anything else.]]