History Manga / DeadDeadDemonsDededededestruction

* DrivenToSuicide: In vol.9, after [[spoiler:Ontan rejected Kadode's efforts to improve the world for her sake, Kadode]] became so distraught that she eventually committed suicide by jumping off a high staircase. This eventually drives [[spoiler:Ontan to have the Invader scout send her into the Ontan of the story's main timeline to try to prevent this fate]]

* {{Fanservice}}: One of the lighter aspects of this series is that it includes a handful of genuinely fanservicey scenes, unlike most of Asano's other works where such material is often FanDisservice. There's a BareYourMidriff shot from Kadode via rumpled bedclothes, a PantyShot from Ontan as she leaps over a pedestrian, and a fairly restrained sex scene between Futaba and a fellow pro-alien protestor with a shot of her getting dressed the next morning. Vol. 7 features Kadode and Ontan in bikinis in some of the chapter transitions before everyone is seen in bikinis on the beach.

* InvisibilityCloak: Part of the alien tech "Oba" has is a sheet of material that mimics its environment. It's first revealed when he and Ontan pull a prank on Kadode, [[spoiler:but it ends up in the possession of the AxCrazy leader of an Invader-killing delinquent gang when he pulls it off "Oba" as he rescues an Invader from them]]. Later, in vol. 8, [[spoiler:the Invader found by Kadode and Ontan give them this device, and Kadode uses it to retaliate against a group of bullies.]]

* {{Yandere}}: {{Downplayed|Trope}} in vol. 9, although the setup starts in vol. 8. [[spoiler:Kadode]] becomes overcome with the desire to make the world a better place for [[spoiler:Ontan]], and uses an Invader device to [[spoiler:cause a number of incidents, including derailing a train and trying to assassinate a Cabinet member]]. However, [[spoiler:when she expresses this to Ontan, Ontan is horrified, even slapping her in shock. This causes Kadode to become so distraught that she eventually commits suicide, setting up the events that lead to the current timeline.]]

* ButterflyOfDoom: The events of the story, from the Invaders' arrivial to [[spoiler:the seemingly imminent doom of humanity]], were apparently set in motion by [[spoiler:Ontan's time manipulation; if she had stayed in her timeline, it's likely that the Invader scout would've warned his people to not come to Earth]].

* {{Cloudcuckoolander}}: Ontan is an incredibly eccentric girl who dreams of [[TakeOverTheWorld taking over the world]]. Her antics are a major source of both entertainment and frustration for Kadode.

* DejaVu: Ontan and "Oba" find a crashed Invader craft in a secluded area of the beach where they're staying; as they explore it, Ontan says that she's having feelings like she's experienced some of what they're doing before. Later, as "Oba" and Makoto are talking, "Oba" reveals that [[spoiler:Ontan has been displaced in time, and that what happened to her and Kadode a few years prior will be revealed soon. Said reveal takes up most of vol. 8 and will continue into vol. 9 if not further.]]

* FaceOnTheCover: Each ''tankobon''[='s=] cover art is a close-up shot of one of the main characters.

* FlyingSaucer: [[ZigZaggingTrope Zig-zagged]] by the Invaders' ships. The mothership that appeared over Tokyo more or less is the classic flying saucer, although it has some structures hanging down from its underside. The smaller vessels that frequently leave the mothership are anything but saucer-like. The smallest vessels strongly resemble satellites and probes like ''Voyager'', but the larger vessels that (attempt to) transport large groups of Invaders to the ground start to resemble everyday human objects. For instance, one looks just like a tea kettle, and another looks like a computer mouse.

* HelicopterPack: Ontan carries around a piece of Invader tech she found, proclaiming at one point that she wants it to be something to let her fly. Not long after, "Oba" uses another of the same device for just that purpose--it clamps to his head, extends rotor blades, and lets him zip off. When he flies to Kadode and Ontan, he tells Ontan that the one she has is out of power.

* PensieveFlashback: The majority of vol. 8 consists of [[spoiler:"Oba" using an Invader device to show Makoto Ontan's memories from an alternate timeline. This shows, among other things: Ontan and Kadode meeting for the first time, Kadode being bullied by her classmates with the "demon" nickname, and them happening across an Invader on a scouting mission and trying to convince him that humans aren't as bad as he thinks they are.]]

* VerbalTic: In the English edition, "Oba" frequently inserts "Wah!" when he's talking.

* YourDaysAreNumbered: As the story progresses, hints drop with increasing frequency that some sort of disaster is going to happen within the next few months. This becomes more clear in volume 5 when [[spoiler:white smoke begins to billow off the mothership, and "Oba" reveals to Ontan that it will eventually crash, causing devastating damage to the planet if its engine explodes]]. Earlier, it's revealed that the Japanese government is aware that something bad is going to happen, and that [[spoiler:the new Olympic stadium is actually a guise for an extra-atmospheric craft which will house a handful of survivors; the governor refers to it at one point as "our ark"]]. Vol. 6 makes things even more clear at its very end with the ominous statement "ONE MONTH UNTIL THE END OF HUMANITY".

[[caption-width-right:350:Clockwise from bottom: Ontan, Kadode, Rin and Ai. Not pictured: Kiho.]]

* StrawNihilist: Largely PlayedForLaughs with Ontan and her brother Hiroshi, the former with her rants about her wiping out or enslaving humanity, the latter with his condescending speeches about everyone's insignificance. They both sound far more ridiculous than intimidating, and people around them just kinda go along with it.

* {{Gonk}}: The strange facial designs of some of the bit characters make them almost alien-looking in and of themselves. Examples include Japan's prime minister, whose tiny, side-by-side eyes make him look like the Isobeyan character from Kadode's mangas; a govt. official whose huge, droopy cheeks make his head look something like a kidney bean; and a pro-alien protester who has an unnaturally squared-off chin and jaw.

* DejaVu: Ontan and "Oba" find a crashed Invader craft in a secluded area of the beach where they're staying; as they explore it, Ontan says that she's having feelings like she's experienced some of what they're doing before. Later, as "Oba" and Makoto are talking, "Oba" reveals that [[spoiler:Ontan has been displaced in time, and that what happened to her and Kadode a few years prior will be revealed soon]].

* InvisibilityCloak: Part of the alien tech "Oba" has is a sheet of material that mimics its environment. It's first revealed when he and Ontan pull a prank on Kadode, [[spoiler:but it ends up in the possession of the AxCrazy leader of an Invader-killing delinquent gang when he pulls it off "Oba" as he rescues an Invader from them]].

** [[PlayingWithATrope Played with.]] The alien spaceship that fills the skies of Tokyo simply looms there not doing anything, with any negative consequences coming from endless attempts to to bring it down and the (sometimes literal) fallout from shooting down smaller craft that leave it. The Invaders have occupied small sections of Tokyo, but they stand no chance against the JSDF and are ruthlessly butchered whenever they're discovered.

* LighterAndSofter: D8 is much more upbeat in comparison to Asano's other works. WordOfGod is that after the ''incredibly'' dark ''Manga/GoodnightPunpun'', he felt he needed to tone it down and give his readers something more light-hearted and escapist for his future projects. Still, considering the series features what amounts to a genocide of aliens and [[spoiler:a seemingly inevitable worldwide catastrophe]], [[SubvertedTrope the "lightness" is relative]].

* BeachEpisode: The latter half of vol. 7 counts as one in aggregate, as the girls spend a few days helping Futaba and the leader of the UFO society research some claims of alien activity at a beachside town. Naturally, this also means a lot of swimming in the ocean and horsing around on the beach, as well as [[spoiler:Ontan telling the Oba!Invader that she loves him]].

* HelicopterPack: Ontan carries around a piece of Invader tech she found, proclaiming at one point that she wants it to be something to let her fly. Not long after, the Oba!Invader uses another of the same device for just that purpose--it clamps to his head, extends rotor blades, and lets him zip off. When he flies to Kadode and Ontan, he tells Ontan that the one she has is out of power.

* HumanAliens: Although their full appearance hasn't been completely revealed, when we finally get a partial look at what's under an Invader's helmet, a seemingly human face is revealed. Later, the Oba!Invader reveals his secret to [[spoiler:Makoto]] by lifting part of his head away from the rest, and the bit of his head that can be seen in the gap looks just like a smaller human's would.
* HumanDisguise: After the crash of an Invader craft kills a male idol group, an Invader appears disguised as one of the group's singers, Oba. [[spoiler:Ch. 47 reveals that certain Invaders with squarish helmets can transfer the essence of normal Invaders into other bodies; in the aftermath of the crash, one sends a dying Invader child into Oba's body.]] Afterward, at times [[https://static.tvtropes.org/pmwiki/pub/images/rsz_d8combo.jpg part of his head comes unaligned from the rest]]; at first his body seems to be hollow, but when he reveals his secret to [[spoiler:Makoto]], his Invader form can be seen inside.

* InvisibilityCloak: Part of the alien tech the Oba!Invader has is a sheet of material that mimics its environment. It's first revealed when Oba and Ontan pull a prank on Kadode, [[spoiler:but it ends up in the possession of the AxCrazy leader of an Invader-killing delinquent gang when he pulls it off Oba as he rescues an Invader from them]].

* ShowWithinAShow: Each ''tankobon'' begins and ends with a few pages from ''Isobeyan'', an in-universe manga about [[ABoyAndHisX a girl and her gadget-toting mushroom alien]], which is pretty much filled with [[{{Expy}} expies]] of the ''Manga/{{Doraemon}}'' crew, right down to imitating the Fujiko F. Fujio art and writing style. Kadode is a huge fan, and the Oba!Invader reads it while he's in Ontan's care.
* SliceOfLife: Much like the author's previous works, the manga follows the lives of its cast growing up and dealing with life. The aliens start out as simply a background element, but gradually get prominence in the story, with the introduction of one who can speak human language.

* TemporaryBulkChange: Kadode plumps up as a consequence of eating Oba’s excellent cooking [[spoiler:and possibly from overeating in emotional pain from losing Watarase]], but is back to her normal size a chapter or two later.

** The Oba!Invader reveals that he has a pair of earplug-like devices that allow him to understand whatever is being said to him regardless of the language...and proves it by conversing with the dog he acquired a few chapters earlier.
** The theme gag of the ''Isobeyan'' comics in this volume is a pair of "interpreter rings" Isobeyan gives Debeko that function the same way as Oba's Invader tech. Unfortunately for her, when she tries to use them on an American (thinking he's going to hit on her), he just asks if she has drugs, and when she uses them on a dog later, the dog tells her she's ugly.
* VerbalTic: In the English edition, the Invader disguised as Oba frequently inserts "Wah!" when he's talking.

* YourDaysAreNumbered: As the story progresses, hints drop with increasing frequency that some sort of disaster is going to happen within the next few months. This becomes more clear in volume 5 when [[spoiler:white smoke begins to billow off the mothership, and the Oba!Invader reveals to Ontan that it will eventually crash, causing devastating damage to the planet if its engine explodes]]. Earlier, it's revealed that the Japanese government is aware that something bad is going to happen, and that [[spoiler:the new Olympic stadium is actually a guise for an extra-atmospheric craft which will house a handful of survivors; the governor refers to it at one point as "our ark"]]. Vol. 6 makes things even more clear at its very end with the ominous statement "ONE MONTH UNTIL THE END OF HUMANITY".

* {{Fanservice}}: One of the lighter aspects of this series is that it includes a handful of genuinely fanservicey scenes, unlike most of Asano's other works where such material is often FanDisservice. There's a BareYourMidriff shot from Kadode via rumpled bedclothes, a PantyShot from Ontan as she leaps over a pedestrian, and a fairly restrained sex scene between Futaba and a fellow pro-alien protestor with a shot of her getting dressed the next morning.

* HumanDisguise: After the crash of an Invader craft kills a male idol group, an Invader appears disguised as one of the group's singers, Oba. [[spoiler:Ch. 47 reveals that certain Invaders with squarish helmets can transfer the essence of normal Invaders into other bodies; in the aftermath of the crash, one sends a dying Invader child into Oba's body.]] Now, when [[https://static.tvtropes.org/pmwiki/pub/images/rsz_d8combo.jpg he sneezes]], part of his head comes unaligned from the rest, revealing that his body seems to be hollow.

* TeacherStudentRomance: Kadode doesn't even try to hide her interest in Watarase, and while he doesn't really take it seriously, he never really turns her down either, especially after breaking up with his girlfriend (and after they're no longer teacher-student). The end of vol. 5 cranks things up considerably [[spoiler:but they break things off early into vol. 6 after Watarase reveals to her that he’s going to return home to take care of his elderly father]].

* {{Gonk}}: The strange facial designs of some of the bit characters make them almost alien-looking in and of themselves. Examples include a govt. official whose huge, droopy cheeks make his head look something like a kidney bean, and a pro-alien protester who has an unnaturally squared-off chin and jaw.

* YourDaysAreNumbered: As the story progresses, hints drop with increasing frequency that some sort of disaster is going to happen within the next few months. This becomes more clear in volume 5 when [[spoiler:white smoke begins to billow off the mothership, and the Oba!Invader reveals to Ontan that it will eventually crash, causing devastating damage to the planet if its engine explodes]]. Earlier, it's revealed that the Japanese government is aware that something bad is going to happen, and that [[spoiler:the new Olympic stadium is actually a guise for an extra-atmospheric craft which will house a handful of survivors; the governor refers to it at one point as "our ark"]].

** The Invader disguised as Oba speaks perfect Japanese.

* YourDaysAreNumbered: As the story progresses, hints drop with increasing frequency that some sort of disaster is going to happen within the next few months. This becomes more clear in volume 5 when [[spoiler:white smoke begins to billow off the mothership, and the Oba!Invader reveals to Ontan that it will eventually crash, causing devastating damage to the planet if its engine explodes]]. Earlier, it's revealed that the Japanese government is aware that something bad is going to happen, and that [[spoiler:the new Olympic stadium is meant to be a shelter, or possibly some kind of spacecraft; the governor refers to it at one point as "our ark"]].

* HighPressureBlood: Whenever an Invader is shot in the head by a soldier, what looks like at least a gallon of blood jets out of the sides and top of its head.
* HumanDisguise: After the crash of an Invader craft kills a male idol group, an Invader appears disguised as one of the group's singers, Oba. Whether or not the disguise counts as a kind of MobileSuitHuman or ReplicantSnatching hasn't been revealed, although when [[https://static.tvtropes.org/pmwiki/pub/images/rsz_d8combo.jpg he sneezes]], part of his head comes unaligned from the rest, revealing that his body seems to be hollow.

* TemporaryBulkChange: Kadode plumps up noticeably as a consequence of eating Oba’s excellent cooking [[spoiler:and possibly from overeating in emotional pain from losing Watarase]], but is back to her normal size a chapter or two later.

* TeacherStudentRomance: Kadode doesn't even try to hide her interest in Watarase, and while he doesn't really take it seriously, he never really turns her down either, especially after breaking up with his girlfriend (and after they're no longer teacher-student). The end of vol. 5 cranks things up considerably [[spoiler:but they break things off early into ch. 6 after Watarase reveals to her that he’s going to return home to take care of his elderly father]].

* TeacherStudentRomance: Kadode doesn't even try to hide her interest in Watarase, and while he doesn't really take it seriously, he never really turns her down either, especially after breaking up with his girlfriend (and after they're no longer teacher-student). The end of vol. 5 seems to be turning things up; after a date, Kadode asks him to hold her hand and says that she doesn't want to go back to her home.

* CastOfSnowflakes: Par for the course with an Inio Asano manga. Kadode is probably the most "normal" looking, Ontan has big eyebrows and weird droopy eyes, Ai is notably chubby-cheeked, Rin is tall with a pointy face, Hiroshi is fat with a tiny face, Futaba has BlushStickers with a red nose, Makoto has large eyes and huge front teeth...

* EnclosedExtraterrestrials: The Invaders are shown wearing full-body suits that include helmets with small ports on the front and sides of the head, making them look a bit like old-fashioned deep sea divers.

* YourDaysAreNumbered: As the story progresses, hints drop with increasing frequency that some sort of disaster is going to happen within the next few months. This becomes more clear in volume 5 when [[spoiler:white smoke begins to billow off the mothership, and the Oba!Invader reveals to Ontan that it will eventually crash, causing devastating damage to the planet if its engine explodes]].

** [[PlayingWithATrope Played with.]] The alien spaceship that fills the skies of Tokyo simply looms there not doing anything, with any negative consequences coming from endless attempts to to bring it down and the (sometimes literal) fallout from shooting down smaller craft that leave it.

* CastOfSnowflakes: No two characters quite look alike. Kadode is probably the most "normal" looking, Ontan has big eyebrows and weird droopy eyes, Ai is notably chubby-cheeked, Rin is tall with a pointy face, Hiroshi is fat with a tiny face, Futaba has BlushStickers with a red nose, Makoto has large eyes and huge front teeth...

* LighterAndSofter: D8 is much more upbeat in comparison to Asano's other works. WordOfGod is that after the ''incredibly'' dark ''Manga/GoodnightPunpun'', he felt he needed to tone it down and give his readers something more light-hearted and escapist for his future projects. Still, considering the series features what amounts to a genocide of aliens, the "lightness" is relative.

* ShowWithinAShow: The "Isobeyan" manga-within-a-manga about [[ABoyAndHisX a girl and her gadget-toting mushroom alien]], which is pretty much filled with [[{{Expy}} expies]] of the ''Manga/{{Doraemon}}'' crew, right down to imitating the Fujiko F. Fujio art and writing style.

* YourDaysAreNumbered: As the story progresses, hints drop with increasing frequency that some sort of disaster is going to happen within the next few months. This becomes more clear in volume 5 when [[spoiler:white smoke begins to billow off the mothership, and Oba reveals to Ontan that it will eventually crash, causing devastating environmental damage to the planet]].

* AliensSpeakingEnglish: Played with. When we finally get a chapter from the aliens' perspective, their dialogue appears in perfectly human text (they even call each other Japanese names like "Yuriko" or "Tsutomu"), but the ''human'' speech appears as a nonsensical gibberish.

* {{Cloudcuckoolander}}: Ontan is an incredibly eccentric girl who dreams of [[TakeOverTheWorld taking over the world]], whose antics are a major source of both entertainment and frustration for Kadode.
* DisappearedDad: Kadode's father disappeared during 8/31, causing his wife to grow increasingly paranoid.

* WholesomeCrossdresser: Makoto claims he's neither gay nor transgender, but he's always liked dressing as a girl and looking cute. He goes to Tokyo because he thinks he'll be more free to express that side of him there. And indeed, neither Futaba nor the other girls seem to care in the slightest. He's busted immediately by Ontan...and they hit it off in a video game exactly one panel later.
* YourDaysAreNumbered: As the story progresses, hints drop with increasing frequency that some sort of disaster is going to happen within the next few months. This becomes more clear in volume 5 when [[spoiler:white smoke begins to billow off the mothership, and Oba reveals to Ontan that it will eventually crash, causing devastating environmental damage to the planet]].

* AlienInvasion: [[PlayingWithATrope Played with]]. The alien spaceship that fills the skies of Tokyo simply looms there not doing anything, with any negative consequences coming from endless attempts to to bring it down and the (sometimes literal) fallout from shooting down smaller craft that leave it.

* ArtstyleDissonance: While the backgrounds are extremely realistic and intricate, the characters look quite cute and cartoonish.

''Dead Dead Demon's Dededede Destruction'' is a strange {{Seinen}} SliceOfLife manga by Creator/InioAsano (author of ''Manga/OyasumiPunpun''), published by Big Comic Spirits and beginning publication on April 28, 2014. The story follows the lives of five high school girls (later college students), focusing mainly on the geeky Kadode Koyama and the [[{{Cloudcuckoolander}} eccentric misanthrope]] Ouran "Ontan" Nakagawa, as they live in a world under the shadow (figurative and literal) of an alien invasion. Combining some at-times dark comedy and social commentary on the Internet's effect on today's youth, this series is notably lighter than some of Asano's earlier works, but still manages to instill a sense of looming disaster that hangs over the head of the cast like the alien spaceships that have become a part of everyday life.

* HighPressureBlood: Whenever an Invader is shot in the head by a soldier, blood jets out of the sides and top of its head.

* SliceOfLife: Much like the author's previous works, the manga follows the lives of its cast growing up and dealing with life; the aliens are simply a background. At least at first, as they gradually get prominence in the story, with the introduction of one who can speak human language.

* TeacherStudentRomance: Kadode doesn't even try to hide her interest in Watarase, and while he doesn't really take it seriously, he never really turns her down either, especially after breaking up with his girlfriend (and after they're no longer teacher-student).
* VerbalTic: The Invader disguised as Oba tends to insert "Wah!" at random when he's talking.

* YourDaysAreNumbered: As the story progresses, hints drop with increasing frequency that some sort of disaster is going to happen within the next few months.