{{Infobox Game
| type          = official game
| titleN        = {{ruby-ja|東方憑依華|とうほう ひょうい ばな}}
| titleEn       = Antinomy of Common Flowers
| image         = [[File:TH155front.jpg|256px|Antinomy of Common Flowers]]
| developer1   =[[Twilight Frontier]]
| developer2   =[[Team Shanghai Alice]]
| publisher1   =[[Twilight Frontier]]
| publisher2   =[[Team Shanghai Alice]]
| publisher3 =Phoenixx Inc. (PS4 & Nintendo Switch)
| publisher1Cat=Twilight Frontier
| publisher2Cat=Team Shanghai Alice
| publisher3Cat=Phoenixx Inc.
| released= 1st Trial: May 7, 2017 ([[:category:Reitaisai 14|Reitaisai 14]])<br/> 2nd Trial: Oct 15, 2017 ([[:category:Autumn Reitaisai 4|Autumn Reitaisai 4]])<br/> Full Version: Dec 29, 2017 ([[:category:Comiket 93|Comiket 93]]) <br/>Steam Release: Jan 5, 2018 <br />PlayStation 4 Release: Apr 22, 2021<br />Nintendo Switch Release: Apr 22, 2021
| convention=  
| genre1        = Competitive
| genre2        = Fighting
| requirements = OS: Windows 7 / 8 / 8.1 /10
*Processor: Intel Core i5, 2.0 GHz
*Memory: 2 GB RAM
*Graphics: NVIDIA® GeForce® GTS 450 or better
*DirectX: Version 11
*Network: Broadband Internet connection
*Storage: 1 GB available space
*Sound Card: DirectSound compatible
*Screen resolution: 1280x720
}}

{{thtitle|Touhou |Hyouibana|ruby=Spirit Possession Bloom| ~ Antinomy of Common Flowers|jp=東方憑依華　～ Antinomy of Common Flowers}} is the 15.5th official installment of the ''[[Touhou Project]]'', developed by [[Team Shanghai Alice]] in conjunction with [[Twilight Frontier]]. The game was announced during the ''Play, Doujin! Year-End Party'' stream.

A first demo was released at the [[Reitaisai 14]] with only 4 characters, a second demo was released at [[Autumn Reitaisai 4]] with more characters from [[Urban Legend in Limbo]], and the full version was released at the [[Comiket 93]]. The game was then released on Steam on January 5th, 2018. A demo port on the PlayStation 4 was displayed at Reitaisai 16 on May 5, 2019, while a port for the Nintendo Switch was released on April 22, 2021. 

==Gameplay==
{{Main|/Gameplay|l1=Gameplay|/Spell Cards|l2=Spell Cards}}
The playable characters are paired up as '''Master''' and '''Slave''', and you can manipulate this designation at will.

The player will choose a pair of Master and Slave, and will fight together while switching between each other as a danmaku tag battle.
A Slave can lend the Master her power, occasionally pull her out of a tough spot, and be disposed in times of emergency.

This game also reintroduced on-screen point collection to the fighting game genre.

==Concept==
The game features a similar style and gameplay to its two predecessors: ''[[Urban Legend in Limbo]]'' and ''[[Hopeless Masquerade]]''. with continuation of the Occult system.

===Name===
An [[Wikipedia:Antinomy|Antinomy]] is a contradiction between one law, principle, or axiom and another. The word is derived in the Greek roots ''antí'' (against, in opposition to) and ''nómos'' (law).

==Story==
{{Main|/Story|l1=Story|/Translation|l2=Translation|/Characters|l3=Characters|/Stages|l4=Stages}}
A strange phenomenon called "Perfect Possession" is taking place.
A phenomenon where one is taken over by a completely different person, not only in mind but also in body.
But have no worry: Reimu is already on her way to investigate the cause behind its occurrence.

"''The strongest duo have joined forces.''" <br>
"''Something bad may be in store for us humans.''" <br>
"''An opponent impossible to defeat by anybody alone?''" <br>

Ludicrous rumors are circulating, seemingly out of the fear in human villagers' hearts.

The so-called "[[Urban Legend in Limbo|Urban Legend Incidents]]", yet to be resolved, have bestowed unsubstantiable rumors with a tendency to manifest in concrete forms.
And this time, the Perfect Possession is obviously yet another Urban Legend Incident.

This story is about those who keep watch on Perfect Possession, those who exploit it, those unwittingly dragged into it, and those working to expose the threat behind it...<br/>
Those who have made the mistake of seeing themselves as the strongest duo. This is a bittersweet story about them.

==Music==
{{Main|/Music|l1=Music}}

==Press==
The game was announced by ZUN on December 11th, 2016, at the ''Play, Doujin! Year-End Party'' stream showing the name and logo of the game. The official page was created later containing a short prologue.

On April 24th, 2017, the official page was updated with a single screenshot from the game showing a duo fight, and a basic description of how the gameplay would be like.

A trial version was released on May 7th, 2017 during [[Reitaisai|Reitaisai 14]].

The website has also been updated to show more in-game screenshots. You can see a roster of characters including all previous characters from [[Urban Legend in Limbo]] and also 5 spaces for 4 additional characters and 1 random button.

On October 5th, 2017, [https://www.youtube.com/watch?v=vktkP0xfukE an official PV] was released, specifying that Ichirin and Nitori will appear in the Autumn Reitaisai 4 demo, and revealing [[Doremy Sweet]] as a new playable character.

In version 0.02, the characters selection screen's user interface changed significantly. Doremy's and the three other new playable's icon were not indicated in this version. A question mark was displayed for each of these four icons instead of the character's face. Moreover, playable characters from Touhou 14.5 had icons shaded grey and could not be selected. The random button also received it's icon displaying two crisscrossing green arrows.

Version 0.02 not only added characters, but also added a stage and stage theme. The Palanquin Ship Flies in the Sky （聖輦船空を行く） is U2's new work for the stage Treasure Ship Above the Clouds (雲上の宝船).

During the 86th edition of the [[Nikenme Radio]] show<ref>https://www.youtube.com/watch?v=RrR1Y2BP-9M</ref> on October 30th, 2017, Tasofro announced that they were preparing a Steam release for the game. It was later confirmed by an entry on Tasofro blog<ref>https://web.archive.org/web/20171215013444/http://tasofro.net/diary/view/159</ref> along with their plan to release the complete version of the game at [[Comiket 93]].

On December 18th, 2017, Tasofro revealed [[Tenshi Hinanawi]] as a playable character on their Twitter account<ref>https://twitter.com/tasofro/status/942684648190046208</ref>.

On December 21st, 2017, Tasofro revealed [[Yukari Yakumo]] as a playable character on their Twitter account<ref>https://twitter.com/tasofro/status/943768666947981313</ref>

On December 27th, 2017, Tasofro announced plans for an English translation<ref>https://twitter.com/tasofro/status/945990580470820864</ref>. It was released in the 1.10 version of the game, on April 24th, 2018.
This makes Antinomy of Common Flowers the first official game to have an official translation.

==English patches==
'''[http://thpatch.net/wiki/Project:Download Download Patcher Here]'''

The following [http://thpatch.net/wiki/Project:Download Touhou Community Reliant Automatic Patcher] repositories provide complete translations of {{PAGENAME}}:
; Touhou Patch Center (<tt>http://srv.thpatch.net/</tt>)
* <tt>lang_en</tt> - Community translation from the [http://thpatch.net Touhou Patch Center] wiki

==External Links==
*[https://www.tasofro.net/touhou155/ Antinomy of Common Flowers official website] (Japanese)
*[http://lunarcast.net/aocf.php Antinomy of Common Flowers Netplay Patch]
*[https://store.steampowered.com/app/716710/_Antinomy_of_Common_Flowers/ Antinomy of Common Flowers on Steam]
*[https://www.nintendo.com/games/detail/touhou-hyouibana-antinomy-of-common-flowers-switch/ Antinomy of Common Flowers on Nintendo eShop]
*[https://aocf.koumakan.jp/Antinomy_of_Common_Flowers_Wiki Unofficial gameplay wiki]

==References==
{{smallrefs}}

{{Navbox Touhou}}
{{Twilight Frontier Games}}
{{Navbox AoCF}}

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