History Manga / SevenBillionNeedles

* WakeUpGoToSchoolSaveTheWorld: This is basically Hikaru's life after Horizon shows up. The "Save the World" part goes a little slowly until Maelstrom finally makes himself known.

* HeelFaceTurn: [[spoiler:Maelstrom.]]

* ThePowerOfFriendship / ThePowerOfLove: Or, as Horizon calls it, the "heart bonds of lifeforms" are what save Hikaru from Maelstrom's nightmare world.

* ShockAndAwe: What Horizon's main offensive powers manifest as through Hikaru.
* SugarAndIcePersonality: Hikaru.
* SuperSpeed: Horizon can do this while controlling Hikaru's body.
* TearfulSmile: Hikaru, near the end of the second book. [[WhenSheSmiles It is beautiful.]]

* NiceJobBreakingItHero: [[spoiler:Horizon manages to find a way to permanently end Maelstrom's extinction spree by containing him within himself (and, by extension, Hikaru). Unfortunately, Horizon and Maelstrom's little cat and mouse game existed to keep the evolution and mutation of life in check, and now that they've both "abandoned their positions"...]]

* {{Kuudere}}: Hikaru.

* WhatTheHellTownspeople: [[spoiler:Hikaru's father was a geologist who moved to the island where they used to live because there were rumors that the island was abundant in a valuable, mineral-rich ore. The other islanders saw this as an opportunity to develop the island into a new community, and put all of their faith and support in Hikaru's father to make it possible. When it turned out that there ''was'' no ore, which he himself didn't know until his superiors told him, everyone on the island blamed him ''personally'' for it. This led to harassment, death threats, assaults on the Takabe house, and ultimately Hikaru's father died while still trying to find the ore even though it was hopeless. It's been years since that happened and people on the island ''still'' blame Hikaru for it.]]

[[quoteright:300:http://static.tvtropes.org/pmwiki/pub/images/Seven_Billion_Needles_2930.jpg]]

* StrangeGirl: Hikaru.

* AlienInvasion: The alien Maelstrom takes a host and then goes on a killing spree. Horizon follows him an attempt to stop him.

* {{Gorn}}: Again, '''''yes'''''. To put it into perspective, we see Hikaru (again, the '''main character''') get vaporized layer-by-layer in the ''very first chapter''. And that's just the beginning...

* HeadphonesEqualIsolation: Hikaru. [[spoiler:She abandons them after her CharacterDevelopment.]]

* SecretKeeper: Saya, though she doesn't know exactly what's up with Hikaru, knows that she's involved with some sort of craziness.
* StrangeGirl: Hikaru. Nao gets in on some of it later on.

* YouAreNotAlone: Said to Hikaru several times.

* AlienInvasion - The alien Maelstrom takes a host and then goes on a killing spree. Horizon follows him an attempt to stop him.

* BodyHorror - Oh, ''yes''. Expect things to get messy whenever Maelstrom is around. And it gets even worse later.
* {{Gorn}} - Again, '''''yes'''''. To put it into perspective, we see Hikaru (again, the '''main character''') get vaporized layer-by-layer in the ''very first chapter''. And that's just the beginning...
* HeelFaceTurn - [[spoiler:Maelstrom.]]

* {{Kuudere}} - Hikaru.
* LovecraftianSuperpower - Hikaru's symbiosis with Horizon borders on this, but the trope really comes into play when [[spoiler:Horizon manages to take Maelstrom prisoner... inside of Hikaru.]]
* NiceJobBreakingItHero - [[spoiler:Horizon manages to find a way to permanently end Maelstrom's extinction spree by containing him within himself (and, by extension, Hikaru). Unfortunately, Horizon and Maelstrom's little cat and mouse game existed to keep the evolution and mutation of life in check, and now that they've both "abandoned their positions"...]]
* OrdinaryHighSchoolStudent - Hikaru, until she ended up sharing her body with a super-powered alien.
* ThePowerOfFriendship / ThePowerOfLove - Or, as Horizon calls it, the "heart bonds of lifeforms" are what save Hikaru from Maelstrom's nightmare world.
* SecretKeeper - Saya, though she doesn't know exactly what's up with Hikaru, knows that she's involved with some sort of craziness.
* StrangeGirl - Hikaru.
* TearfulSmile - Hikaru, near the end of the second book. [[WhenSheSmiles It is beautiful.]]
* ViciousCycle - Maelstrom attempts to wipe out all life on a planet, Horizon chases him and attempts to stop him. They move onto another planet, Maelstrom wipes out all life, Horizon chases him, they move onto another planet...
* WakeUpGoToSchoolSaveTheWorld - This is basically Hikaru's life after Horizon shows up. The "Save the World" part goes a little slowly until Maelstrom finally makes himself known.
* YouAreNotAlone - Said to Hikaru several times.

* HeelFaceTurn - [[spoiler:Maelstrom]]
* HeadphonesEqualIsolation: Hikaru.

* LovecraftianSuperpower - Hikaru's symbiosis with Horizon borders on this, but the trope really comes into play when [[spoiler:Horizon manages to take Maelstrom prisoner... inside of Hikaru]].

* TearfulSmile - Hikaru, near the end of the second book.

Inspired by ''Needle'', the Golden Age hard sci-fi classic by the late Hal Clement, Nobuaki Tadano's debut work brings a unique take on alien invasion up to date and into the maelstrom that is the Japanese high school girl.

!Tropes

* YouAreNotAlone - Said to Hikaru several times.