A WebSerialNovel by Tropers/MagicConan14 (aka Courage's admin) that can be read [[http://courage-a-word-of-justice.tumblr.com/tagged/expiry-date here]]. However, in the spirit of Tumblr, the latest chapters appear first. It's a story which was first published in 2013.
In 2014, there are creatures called Barcodes which are released to keep the inhabitants of Sezaria under control. Kieran and Dawn, the two protagonists, defeat the Barcodes and relieve the citizens of their fear.
Some of the citizens, including Dawn's father and Kieran, are the Dated - their wrists have their [[TitleDrop expiry date]] on them. So, Dawn and Kieran try to live their lives as much as they can before the latter dies. However, Kieran's sister Electra, who's one of the Barcode creators for a group called Alkahest, won't make it an easy task...
!!''Expiry Date'' contains examples of:
* ADayInTheLimelight: Hideaki and Haruka get theirs in a side story called ''Different''. Dawn receives a less extreme version in the first chapter and Daisuke gets his less extreme version during the fight focussing on him.
* BroodingBoyGentleGirl: ...everything but the "gentle" part works, because Dawn's an ActionGirl who actually hogs the spotlight during the first Barcode battle.
* CaptainObvious: The creatures are called Barcodes because they have barcodes on them. See TemporalThemeNaming for another example.
* CatGirl: Miyano-sensei, who was an experiment of Alkahest before becoming a teacher for the Dated.
* DualTonfas: Dawn has a pair.
* HumanityEnsues: Daisuke the bird can become human. Noting that he's very small as a bird, it's quite understandable.
* ImprobableWeaponUser: Daisuke uses a laptop in combat - not by hitting people with it, but by typing commands with it.
* LonelyRichKid: Kieran.
* LikeYouWereDying: Kieran and Hideaki, both being Dated, can be said to have this bond. Kieran isn't much of a "life is fun" person, though.
* MagicPants: Averted with Daisuke, who has to gain his clothes from "who-knows-where" and dress himself before anything happens.
* NextSundayAD: Except for the Barcodes and the Dated, it's pretty much the same as the present - the end of the first chapter even mentions they still have to go to school. The world must have changed a lot in 2013.
* OneOfUs: The author notes that ''Expiry Date'' began from combining Manga/AbsoluteBoyfriend with the TVTropes article ScannableMan.
* OrdinaryHighSchoolStudent: Averted, big time.
* RoyalRapier: Kieran has not one, but two [[DualWielding dual wielded]].
* RubberForeheadAliens: the Automata, which were what the author was aiming for in FanFic/Experiment.
* ShoutOut: ''Of Dusk and Dawn'', a fanfic by the same author, was published around the same time. With the TemporalThemeNaming mentioned below, it's [[SarcasmMode got to be a coincidence]].
* ShapeshifterWeapon: the Automata are this, with Haruka showing how it's done in ''Different''.
* SniperRifle: Hide's WeaponOfChoice.
* SummonToHand: It's explained the weapons exist in a [[PocketDimension dimension of their own]] until the procedure to associate a weapon to a person is done, hence it being a property of all the items.
* SuperWeaponAverageJoe: One trope for all the associated weapon users, but especially Hideaki.
* TemporalThemeNaming: Kieran's name, depending on source, will vary in meaning but will always have one thing in common: the word "dark" - obviously referring to a darker time of day like dusk. Dawn is...well, [[CaptainObvious dawn]].
* TitleDrop: In the first Barcode battle. A bit ironic, if you observe it.
--> Barcode: Your [[SssssnakeTalk exss-piry]] date is today.
--> Kieran: (after finishing off the Barcode and glancing down at his right wrist) Nope, it's your expiry date.
* WakeUpGoToSchoolSaveTheWorld: Hey, wait a second...[[Literature/RoTeO some of these tropes seem familiar]]...
* YourDaysAreNumbered: The basis of this story.