Write a realistic, sensible and plausible, year by year alternate history scenario in the form of a historical documentary book chapter, as a backstory for a fanfic  crossing over Boku no Hero Academia, Handoredd [Hundred |Handoredd|], IS: Infinite Stratos, Heavy Object, Muv-Luv, Black Bullet, Magika no Kenshi to Shōkan Vashireusu [Swordsmen of Magic Technique School and Summoned Basileus |Demon King (Basileus)|] in which the emergence of Quirks [superhuman abilities |Quirks| that a person can possess, |Quirks| being |Quirks| unique |Quirks| to each user, |Quirks being| sorted into multiple categories with Quirk users being |Quirk users| limited  |Quirk users| to  |Quirk users| only developing one ability from |the media franchise Quirks are |Quirks| from Boku no Hero Academia] in [when Quirks emerge in this alternate history timeline] the post-Cold War 1990s [the emergence of Quirks after the end of the Cold War between the USA and the USSR in |when the Cold War ended| 1989] conceals [what the emergence of Quirks in the 1990s conceals] the return of [what returns in the 1990s that is concealed by the rise of Quirks] Divas [another word |Diva| for |what a Diva is also called| a contracted spirit which |a contracted spirit/'Diva'| is |what a contracted spirit/'Diva' is| manifestation of a creature, a concept, or a character from some mythology or folk belief |a contracted spirit/'Diva'| that |what a contracted spirit/'Diva' does| forms |what a Diva forms| a contract with |the human or supernatural entity a contracted spirit/'Diva' forms a contract with| a chosen human or supernatural creature, |the human or supernatural creature a 'Diva'/contracted spirit forms a contract with| usually being a female between the ages of 13-29 |the contract between a Diva and its chosen human or supernatural creature| being represented by |what the contract between a Diva and its chosen human or supernatural creature is represented by| a mark known as |what the mark that represents the contract between a Diva and its chosen human or supernatural creature is known as| a Stigima that |the Stigma| usually |the Stigma| is |what normally happens to a Stigma| on the contractor's right hand, |the contract between a contracted spirit/'Diva' and its chosen human or supernatural creature being known as a Stigma| and |what else the contract between a contracted spirit/'Diva' and its chosen human or supernatural creature does apart from the contractor recieving a stigma| giving the contractor |what the contractor gets from the contract between herself and the contracted spirit/'Diva' she has formed a contract with| the ability to |the supernatural ability the contractor gets from the contract between herself and the contracted spirit/'Diva' she has formed a contract with| materliaize and use a Décolleté Oblique/Decorteo Brigieux |Oblique Neckline/Magical Dress/"Cleavage required" (Décolleté Oblique/Decorteo Brigieux), a special set of armor (Décolleté Oblique/Decorteo Brigieux) that (Décolleté Oblique/Decorteo Brigieux) most of the time resembles (what a Décolleté Oblique/Decorteo Brigieux mostly resembles) a revealing set of knight or mage armor usually seen in perverted visual novels, anime, manga and J-RPGS, that ( a Décolleté Oblique/Decorteo Brigieux) can (a Décolleté Oblique/Decorteo Brigieux) only be used by (who are the only persons who can use Décolleté Oblique/Decorteo Brigieux) female humans and supernatural creatures that (the female humans and supernatural creatures who can use Décolleté Oblique/Decorteo Brigieux) have (the female humans and supernatural creatures who can use Décolleté Oblique/Decorteo Brigieux) formed contracts with (what supernatural entity the female humans and supernatural creatures who can use Décolleté Oblique/Decorteo Brigieux have formed contracts with) contracted spirits/'Divas', that (a Décolleté Oblique/Decorteo Brigieux) only appears (a Décolleté Oblique/Decorteo Brigieux) when (the time when a Décolleté Oblique/Decorteo Brigieux appears and can be used) the contractor is in battle or (the contractor) otherwise using more than a small percentage of the contracted spirit/'Diva''s power| as well as |the supernatural ability the contractor gets from the contract between herself and the contracted spirit/'Diva' she has formed a contract with apart from recieving a Stigma and gaining the ability to use a Décolleté Oblique/Decorteo Brigieux| the ability to use the the contracted spirit/'Diva''s she has formed a contract with's magic, |Divas| from |the media franchise Divas are (Divas) from| Magika no Kenshi to <PRESIDIO_ANONYMIZED_PERSON>], [the rise of Quirks concealing the resurgence of Divas] with a quite large amount of Diva contractors being able to pass themselves off as Quirk users. The development of the the IS unit [Infinite Stratos, |an IS unit| a powered exoskeleton |an IS unit| originally created |the IS units| for |what the IS units for originally created for| space exploration, that |an IS unit| possess |what an IS unit possesses| technology and combat capabilities far more advanced than any other weapon system while |an IS unit| possessing |the specific capabilities, equipment and weapons of an IS unit| nigh-invulnerable shield barrier, 100% optical camouflage, hypersonic speeds, and capable of pulling off insane high G maneuvers while seemingly unaffected by gravity-induced blackout/red-outs and also space flight an |an IS unit| can |an IS Unit| only be used by girls, |the IS unit| from |the media franchise the IS unit is (the IS Unit) from] IS: Infinite Stratos is [the IS Unit's development] done in order to [why the IS unit is (the IS unit) created (the IS Unit) in this timeline] as a means of [what the creation of the IS unit is (the IS unit's) creation for] manifesting a Décolleté Oblique/Decorteo Brigieux formed [a Décolleté Oblique/Decorteo Brigieux] through a contract with a Diva through technological and not through the usual arcane means. 

Before the emergence of Quirks and the remergence of Divas, in the closing stages of the Cold War, the Dai Nippon Teikoku/Dai Nihon Teikoku [Great Empire of Nihon/Great Nihon-jin |Japanese (Nihon-jin)| Empire/Great Nihon/Third Nihon-jin Empire/Imperial Nihon/Nihon-jin Empire |Dai Nippon Teikoku/Dai Nihon Teikoku|], a unitary parliamentary semi-constitutional democratic federalist absolute imperial dynastic royal monarchy [the Dai Nippon Teikoku/the Dai Nihon Teikoku] ruled [the Dai Nippon Teikoku/the Dai Nihon Teikoku] by [the Dai Nippon Teikoku's/the Dai Nihon Teikoku's reigining monarchial family] the Daiwa Kōshitsu [the Imperial House of Great Yamato |Daiwa Kōshitsu|], [the Daiwa Kōshitsu] also [the Daiwa Kōshitsu] known [the Daiwa Kōshitsu] as [the other name for the Daiwa Kōshitsu] the Gen Ouchou [Minamoto dynasty |Gen Ouchou|] as [what the Daiwa Kōshitsu/the Gen Ouchou ruled the Dai Nippon Teikoku/the Dai Nihon Teikoku as] its [the Dai Nippon Teikoku's/the Dai Nihon Teikoku's] Ōke [imperial family |Ōke|], [the Dai Nippon Teikoku/the Dai Nihon Teikoku ruled |the Dai Nippon Teikoku/the Dai Nihon Teikoku| by the Daiwa Kōshitsu/the Gen Ouchou as its |the Dai Nippon Teikoku's/the Dai Nihon Teikoku's| Ōke|], ruling [the Dai Nippon Teikoku/the Dai Nihon Teikoku] over [the territories in East Asia controlled by the Dai Nippon Teikoku/the Dai Nihon Teikoku] the Nihon Hondo [the Japanese Home Islands |Nihon Hondo|], Chōsen [the Korean peninsula/Korea/Hanguk |Chōsen|, |Chōsen| known as |Chōsen's| other name Hanguk in |which language Chōsen is (Chōsen) known (Chōsen) as Hanguk in Hangugeo |Korean/the Korean language (Hangugeo)| Chōsen] Ryūkyū/Ruuchuu [the Ryukyu islands/Okinawa/Ryukyu |Ryūkyū/Ruuchuu|], Karufuto [Russia's Sahlakin and Kuril Islands |Karufuto|], Formosa [Taiwan and the Pengu Islands |Formosa|]Senkaku [China's Daiyou Islands |Senkaku|], the Carolines and the Marinas from [when the Dai Nippon Teikoku's/the Dai Nihon Teikoku's rule over the Nihon Hondo, Ryūkyū/Ruuchuu, Chōsen, Senkaku, Formosa, the Carolines and the Marinas lasted] 1868–1947, [the Dai Nippon Teikoku/Dai Nihon Teikoku] had [what happened to the Dai Nippon Teikoku/Dai Nihon Teikoku] returned [the end-stage Cold War restored Dai Nippon Teikoku/Dai Nihon Teikoku] reclaiming [what the endstage Cold War restored Dai Nippon Teikoku/Dai Nihon Teikoku reclaimed] its [the Dai Nippon Teikoku's/Dai Nihon Teikoku's] non-Nihon-jin territories [Chōsen, Karufuto and Formosa] and [the end-stage Cold War restored Dai Nippon Teikoku/Dai Nihon Teikoku] quickly becoming a major power as the Cold War ended and Quirks, and more quietly, Divas, emerged.

 The Běiyáng Zhèngfǔ [Beiyang Government |Běiyáng Zhèngfǔ|], a stratocratic [military controlled |stratocratic] authoritarian semi-totalitarian regency [the Běiyáng Zhèngfǔ] for [which historic East Asian state the Běiyáng Zhèngfǔ was |the Běiyáng Zhèngfǔ| a regency|the Běiyáng Zhèngfǔ| for]  the Dà Míngguó  [Great Ming State/Empire of the Great Ming/Great Ming/Ming Empire |Dà Míngguó|], [the Dà Míngguó] also [what also happened to the Dà Míngguó] known [the Dà Míngguó] as [the Dà Míngguó's other name] the Míng Cháo ["Ming dynasty" |Míng Cháo|], a stratocratic feudalist aristocratic absolute imperial monarchy [the Dà Míngguó/the Míng Cháo] that [the Dà Míngguó/Míng Cháo] was [what the Dà Míngguó/Míng Cháo was] the last [the Dà Míngguó/Míng Cháo] of [what the Dà Míngguó/Míng Cháo was the last of] the imperial dynastic states governed and administered under the traditional Huárén [Han Chinese/Chinese |Huárén|] imperial dynastic feudal system [the Dà Míngguó/the Míng Cháo], [the Dà Míngguó/the Míng Cháo being |the Dà Míngguó/Míng Cháo| the last |the Dà Míngguó/Míng Cháo| of the imperial dynastic states governed and administered under the traditional Huárén [Han Chinese/Chinese/Han |Huárén|] system |the Dà Míngguó/Míng Cháo|], [the Dà Míngguó/Míng Cháo] being [what happened to the the Dà Míngguó/Míng Cháo] ruled [the Dà Míngguó/the Míng Cháo] by [who was the the Dà Míngguó's/Míng Cháo's reigning monarchial family] the Zhū Huángfǔ [Imperial House of Zhu/Zhu imperial family/Imperial Clan of Zhu/Zhu clan |Zhū Huángfǔ|] as [what the Zhū Huángfǔ ruled the Dà Míngguó/the Míng Cháo as] its [the Dà Míngguó's/Míng Cháo's] huángshì [imperial family |huángshì|], [the Zhū Huángfǔ ruling over the Dà Míngguó/Míng Cháo as its |the Dà Míngguó's/the Míng Cháo's| huángshì] ruling [the Dà Míngguó/Míng Cháo] over [the East Asian nation the Dà Míngguó/the Míng Cháo ruled over] Zhōngguó [Han China/Hanland/China |Zhōngguó|] from [how long the Dà Míngguó/Míng Cháo ruled over Zhōngguó] 1368-1644, the Běiyáng Zhèngfǔ being |the Běiyáng Zhèngfǔ| a regency |the Běiyáng Zhèngfǔ| for the Dà Míngguó's/Míng Cháo's restoration] that [the Běiyáng Zhèngfǔ] was [what the Běiyáng Zhèngfǔ was] the government [Běiyáng Zhèngfǔ] of [which East Asian regime the Běiyáng Zhèngfǔ was |the Běiyáng Zhèngfǔ| the government |the Běiyáng Zhèngfǔ| of] the Zhōnghuá Mínguó [the Republic of China/Chinese Republic/Republican China |Zhōnghuá Mínguó|] a semi-democratic aristocratic parliamentary presidential republic [the Zhōnghuá Mínguó] that [the Zhōnghuá Mínguó] ruled [the Zhōnghuá Mínguó] over [the East Asian nation the Zhōnghuá Mínguó ruled over] Zhōngguó, 1912-1928, and then from 1937-1945 as [what the Zhōnghuá Mínguó ruled over Zhōngguó as from 1937-1945] theZhōnghuá Mínguó Guómín Zhèngfǔ [Reorganized National Government of the Republic of China/Reorganized Nationalist China/Reorganized Chinese Republic/Constitutional Chinese Republic |Zhōnghuá Mínguó Guómín Zhèngfǔ|], a protectorate [the Zhōnghuá Mínguó Guómín Zhèngfǔ] of [the East Asian nation the Zhōnghuá Mínguó Guómín Zhèngfǔ was |the Zhōnghuá Mínguó Guómín Zhèngfǔ| a protectorate |the Zhōnghuá Mínguó Guómín Zhèngfǔ| of] the Dai Nippon Teikoku/Dai Nihon Teikoku, [the Běiyáng Zhèngfǔ ruling over the Zhōnghuá Mínguó] is [the Běiyáng Zhèngfǔ ruling over the Zhōnghuá Mínguó] restored [the Běiyáng Zhèngfǔ ruling over the Zhōnghuá Mínguó] soon after [the Dai Nippon Teikoku's/Dai Nihon Teikoku's end-stage Cold War return] with the Huárén monarchy [the Dà Míngguó/Míng Cháo ruled |the Dà Míngguó/Míng Cháo| by the Zhū Huángfǔ as its |the Dà Míngguó's/Míng Cháo's| huángshì |the Zhū Huángfǔ|] soon after [the Běiyáng Zhèngfǔ's ruling over the Zhōnghuá Mínguó's end-stage Cold War restoration in Zhōngguó], [the Dà Míngguó/Míng Cháo being |the Dà Míngguó/Míng Cháo| restored |the Dà Míngguó/Míng Cháo| soon after the Běiyáng Zhèngfǔ's ruling over the Zhōnghuá Mínguó's end-stage Cold War restoration in Zhōngguó] with the Nihon-jin [what the Nihon-jin do] restoring [what the Nihon-jin restore] the Dà Mǎnzhōu Dìguó/Dae Manju Jegug/the Mahaan Manchooriyan Saamraajy/the Periya Mañcūriyaṉ Pēraracu/Ikh Manjuuryn Ezent Güren [the Great Manchurian Empire/Empire of Great Manchuria/Manchukuo/Manchoukuo |Dà Mǎnzhōu Dìguó/Dae Manju Jegug/the Mahaan Manchooriyan Saamraajy/the Periya Mañcūriyaṉ Pēraracu/Ikh Manjuuryn Ezent Güren|] and the Aisin-Jiorogiin Ezen Khaany Ger Bül/Aisin-Jiyoro Impeeriyal Parivaar/Aiciṉ-Jiyōrō Impīriyal Kuṭumpam [the Imperial House of Aisin-Gioro |the Aisin-Jiorogiin Ezen Khaany Ger Bül/Aisin-Jiyoro Impeeriyal Parivaar/Aiciṉ-Jiyōrō Impīriyal Kuṭumpam|] in [where in the Nihon-jin restore the Dà Mǎnzhōu Dìguó/Dae Manju Jegug/the Mahaan Manchooriyan Saamraajy/the Periya Mañcūriyaṉ Pēraracu/Ikh Manjuuryn Ezent Güren andthe Aisin-Jiorogiin Ezen Khaany Ger Bül/Aisin-Jiyoro Impeeriyal Parivaar/Aiciṉ-Jiyōrō Impīriyal Kuṭumpam in] Dōngběi [Northeastern China (Dōngběi), consisting (Dōngběi) of (the East Asian territories that make up Dōngběi) Manchuria, Russia’s Amur Oblast, Russia’s Primorskaya Oblast and the southern part of Russia’s Khabarovsk Krai region (Dōngběi)|], [the Nihon-jin restoring the Dà Mǎnzhōu Dìguó/Dae Manju Jegug/the Mahaan Manchooriyan Saamraajy/the Periya Mañcūriyaṉ Pēraracu/Ikh Manjuuryn Ezent Güren and the Aisin-Jiorogiin Ezen Khaany Ger Bül/Aisin-Jiyoro Impeeriyal Parivaar/Aiciṉ-Jiyōrō Impīriyal Kuṭumpam in Dōngběi after the Dà Míngguó's/Míng Cháo's end-stage Cold War restoration through the Běiyáng Zhèngfǔ] along with [the other historic monarchy the Nihon-jin restore apart from the Dà Mǎnzhōu Dìguó/Dae Manju Jegug/the Mahaan Manchooriyan Saamraajy/the Periya Mañcūriyaṉ Pēraracu/Ikh Manjuuryn Ezent Güren after the Dà Míngguó's/Míng Cháo's end-stage Cold War restoration through the Běiyáng Zhèngfǔ]  the Mongolyn Öörtöö Zasakh Kholboot Zasgiin Ordon/Mengjiang [Mengjiang United Autonomous Government/Mongolian Autonomous Federation/the Federal Autonomous Government of Mongolia |the Mongolyn Öörtöö Zasakh Kholboot Zasgiin Ordon/Mengjiang| a constitutional democratic absolute royal monarchy |the Mongolyn Öörtöö Zasakh Kholboot Zasgiin Ordon/Mengjiang|] and the Borjiginy Ezen Khaany ger Bül [Imperial House of Borjigin |the Borjiginy Ezen Khaany ger Bül|] in [where the Nihon-jin restore the Mongolyn Öörtöö Zasakh Kholboot Zasgiin Ordon/Mengjiang and the Borjiginy Ezen Khaany ger Bül in] Nèi Měnggǔ's [Inner Mongolia's |Nèi Měnggǔ's|] Charhar and Zhōngguó's Suiyan region. 

The revived East Asian monarchies [the end-stage Cold War restored Dai Nippon Teikoku/Dai Nihon Teikoku, the end-stage Cold War restored Dà Míngguó/Míng Cháo, the end-stage Cold War restored Dà Mǎnzhōu Dìguó/Dae Manju Jegug/the Mahaan Manchooriyan Saamraajy/the Periya Mañcūriyaṉ Pēraracu/Ikh Manjuuryn Ezent Güren and the end-stage Cold War restored Mongolyn Öörtöö Zasakh Kholboot Zasgiin Ordon/Mengjiang] dominate East Asia, with the end-stage Cold War restored Dai Nippon Teikoku/Dai Nihon Teikoku restoring [what the end-stage Cold War restored Dai Nippon Teikoku/Dai Nihon Teikoku restores] the Devlet-i ʿAlīye-i ʿOsmānīye [Ottoman Empire/Sublime Ottoman State/Eastern Roman Sultanate |Devlet-i ʿAlīye-i ʿOsmānīye|] and the Ḫānedān-ı Āl-i ʿOsmān [Imperial House of Osman |Ḫānedān-ı Āl-i ʿOsmān|] in [where the end-stage Cold War restored Dai Nippon Teikoku/Dai Nihon Teikoku restores the Devlet-i ʿAlīye-i ʿOsmānīye and the Ḫānedān-ı Āl-i ʿOsmān in] Sherqiy Türkistan/Uyghuristan [Xinjiang/East Turkestan |Sherqiy Türkistan/Uyghuristan|], [the end-stage Cold War restored Dai Nippon Teikoku/Dai Nihon Teikoku restoring the Devlet-i ʿAlīye-i ʿOsmānīye and the Ḫānedān-ı Āl-i ʿOsmān in Sherqiy Türkistan/Uyghuristan] and [what else the end-stage Cold War restored Dai Nippon Teikoku/Dai Nihon Teikoku does apart from |the end-stage Cold War restored Dai Nippon Teikoku/Dai Nihon Teikoku| restoring the Devlet-i ʿAlīye-i ʿOsmānīye and the Ḫānedān-ı Āl-i ʿOsmān in Sherqiy Türkistan/Uyghuristan] reviving the rule of the Llamas in Bod [Tibet |Bod|].

Meanwhile in Europa [Europe], the fall of the Berlin Wall, the weakening of the Warsaw Pact and the subsequent weakening and dissolution of the CCCP [Soviet Union |CCCP] sees das Deutsches Reich [the German Empire/Imperial Germany/the Imperial State of Germany |das Deutsches Reich|], which [das Deutsches Reich] was [what das Deutsches Reich was] a semi-constitutional absolute federal democratic imperial presidental parliamentary monarchy [das Deutsches Reich] located [das Deutsches Reich] in [the geographical location of die Deutsches Reich] Central and parts of Western and Eastern Europe, and [das Deutsches Reich] ruled over [the territories ruled over by die Deutsches Reich during its existence] Deutschland [East and West Germany |Deutschland|] and die Königreich Preußen [the Kingdom of Prussia |die Königreich Preußen|, which |die Königreich Preußen| consisted of |the territories controled by die Königreich Preußen| Western Polska |Poland (Polska)| and Rossiya's |Russia's (Rossiya's)| Kalingrad Region as well as parts of Czechia] from [the time period which the das Deutsches Reich ruled over Deutschland and die Königreich Preußen from] 1871-1919, [das Deutsches Reich which |das Deutsches Reich| ruled over Deutschland and die Königreich Preußen from 1871-1919] which [die Deutsches Reich] was [die Deutsches Reich] ruled [das Deutsches Reich] by [the reigning family of Die Deutsches Reich acting as its constitutional imperial heads of state] die Haus Hohenzollern [the Royal House of Hohenzollern |die Haus Hohenzollern|], [die Haus Hohenzollern] which [die Haus Hohenzollern] ruled over [the European monarchial royal state die Haus Hohenzollern ruled over apart from die Deutsches Reich] die Königreich Preußen as [what the heads of die Haus Hohenzollern ruled over die Königreich Preußen as in their position as royal monarchial heads of state] is [die Königreich Preußen's] royal family [die Haus Hohenzollern], [die Haus Hohenzollern ruling over die Königreich Preußen as its royal family] as [the positions the reigning heads of die Haus Hohenzollern held as constitutional imperial monarchial heads of state of das Deutsches Reich] its [das Deutsches Reich's] Kaisers [Emperor |Kaiser|, or in the case of Das Deutsches Reich, |the position of Kaiser| was |what happened to the position of Kaiser within das Deutsches Reich| combined |the position of Kaiser within das Deutsches Reich| with |what the position of Kaiser was combined with| the position of |the other government position the position of Kaiser was combined with in das Deutsches Reich| Reichspräsident |Imperial President/Realm President/President of the Realm/President of the Empire (Reichspräsident)|, which |the position of Reichspräsident the position of Kaiser was combined with in das Deutsches Reich| combined |what positions were combined within the office of Reichspräsident| the positions of leader of the armed forces and head of state within das Deutsches Reich, along with the ability to appoint and dismiss Reichkanzlers |Imperial Chancellors/Realm Chancellors/Chancellors of the Realm/Chancellors of the Empire (Reichkanzlers)|, who |Reichkanzlers| were |what Reichkanzlers were within the government heirarchy of das Deutsches Reich| the heads of government |Reichkanzlers| of |the European monarchial nation state Reichkanzlers were heads of governments of| das Deutsches Reich |Reichkanzlers| chosen |Reichkanzlers| by |who chose the Reichkanzlers in das Deutsches Reich| the Kaisers |of das Deutsches Reich| from |where the Kaisers of das Deutsches Reich chose the Reichkanzlers from| the winning party of das Deutsches Reich's democratic general elections, as well as |the other function of the position of Reichspräsident which was combined with that of Kaiser in das Deutsches Reich, apart from being a combined head of state and of the armed forces and having the ability to appoint and dismiss Reichkanzlers| to |what the other function of the position of Reichspräsident which was combined with that of Kaiser in das Deutsches Reich, apart from being a combined head of state and of the armed forces and having the ability to appoint and dismiss Reichkanzlers was| send away the Reichstag |the federal parliament (Reichstag) of (the European imperial monarchial nation the Reichstag was the federal parliament of) das Deutsches Reich|.], [Das Deutsches Reich] being [what happens to Das Deutsches Reich after the fall of the Berlin Wall] restored [Das Deutsches Reich] after [what happens before Das Deutsches Reich's end-stage Cold War restoration] the fall of the Berlin Wall, [Das Deutsches Reich being |Das Deutsches Reich| restored |Das Deutsches Reich| after the Fall of the Berlin Wall] along with [the historic European state that is restored after the fall of the Berlin Wall along with Das Deutsches Reich]  Die Österreichisch-Ungarische Monarchie [the Austria-Hungarian Empire/Empire of Greater Austria/Germanic Roman Empire/Germanic Rome |die Österreichisch-Ungarische Monarchie|], a European confederal semi-democratic feudal elective federal parliamentary Catholic theocratic imperial royal Roman-style monarchy [Die Österreichisch-Ungarische Monarchie] located [Die Österreichisch-Ungarische Monarchie] within [Die Österreichisch-Ungarische Monarchie's location within Europa]  Central, parts of Eastern Europe and the Balkans, which [die Österreichisch-Ungarische Monarchie] was [what happened to die Österreichisch-Ungarische Monarchie] ruled [die Österreichisch-Ungarische Monarchie] by [the reigning family of die Österreichisch-Ungarische Monarchie] the Schweizer [Swiss | Schweizer|]-Österreicher [Austrian |Österreicher|] Haus Habsburg-Lothringen [the House of Habsburg-Lorraine |Haus Habsburg-Lothringen|] as [what Haus Habsburg-Lothringen ruled Das Österreichisch-Ungarische Monarchie as] its [Das Österreichisch-Ungarische Monarchie] Kaiserhaus [imperial family |Kaiserhaus|] and [die Österreichisch-Ungarische Monarchie] ruled [die Österreichisch-Ungarische Monarchie] over [the territories controlled by die Österreichisch-Ungarische Monarchie] die Österreich [Austria, Romanian Bukovina and Slovenia |die Österreich|], Böhmen [Bohemia |Böhmen| Czetchia and Slovakia], Ungarn [Hungary, Romania's Transylvania and Banat regions |Ungarn|], Galicia-Lodomeria [Polska's Western Galicia region and parts of Khazaria |Galicia-Lodomeria|] and Illyria [Croatia and Bosnia |Illyria|] from [the period of die Österreichisch-Ungarische Monarchie's rule over die Österreich, Böhmen, Ungarn and Illyria lasted for] 1867–1918, [Das Deutsches Reich's and Die Österreichisch-Ungarische Monarchie's end-stage Cold War restoration] marking the start of Deutsche [German] and Österreicher dominance over Europa once more as the Rossiyskaya Imperiya [|Russian Empire/Imperial Russia/Empire of Russia/Imperial State of Russia/Third Rome/the Third Roman Empire/Restored Eastern Rome/Russian Rome/Restored Eastern Roman Empire (Rossiyskaya Imperiya)|, a unitary absolute parliamentary semi-constitutional imperial Roman-style Ellinorthódoxi Ekklisía |Greek Orthodox (Ellinorthódoxi Ekklisía)| royal imperial monarchy |the Rossiyskaya Imperiya|] and the Danskere |Danish (Danskere)|-Deutsche |German (Deutsche)|-British Imperatorsky Dome Schlesvig-Golstein-Gottorp-Romanovych |Imperial House of Schleswig-Holstein-Gottorp-Romanov (Dome Schlesvig-Golstein-Gottorp-Romanovych)|] make a return in post-Soviet European Rossiya with covert Deutsche and Österreicher help, the Soviet satelite states in Eastern Europe under the Warsaw Pact as well as the Soviet constituent republics in the Caucuses giving way to restored Deutsche and Österreicher client states and satelite kingdoms initially created in WW1 through the Treaty of Brest-Litovsk as communist loyalists either leave, are chased from or are deported from the former Soviet territories and puppet states. 

Tactical Surface Fighters/TSFs [oversized fighter planes |TSF|, |TSFs covered in| the substance TSFs are (TSFs) covered (TSFs) in| an anti-projectile and heat-resistant composite that |the anti-projectile and heat-resistant composite that TSFs are (TSFs) covered (TSFs) in| has |the anti-projectile and heat-resistant composite that TSFs are (TSFs) covered (TSFs) in| been |the anti-projectile and heat-resistant composite that TSFs are (TSFs) covered (TSFs) in| been |the anti-projectile and heat-resistant composite that TSFs are (TSFs) covered (TSFs) in| been |the anti-projectile and heat-resistant composite that TSFs are (TSFs) covered (TSFs) in| further treated |the anti-projectile and heat-resistant composite that TSFs are (TSFs) covered (TSFs) in| been |the anti-projectile and heat-resistant composite that TSFs are (TSFs) covered (TSFs) in| with |the anti-projectile and heat-resistant composite that TSFs are (TSFs) covered (TSFs) in| been |the anti-projectile and heat-resistant composite that TSFs are (TSFs) covered (TSFs) in’s further treatment| anti-laser coating with |what TSFs have| the ability |TSFs| to |what TSFs can (TSFs) do| operate |TSFs| in every sort of condition, |TSFs| having |what TSFs possess| particle beam cannon and plasma blaster weaponry, |TSFs| being |what TSFs are| able |TSFs| to |TSFs| operate in space in addition to |TSFs| flying in the skies of Earth, |TSFs| being |what TSFs are| near impossible to destroy |TSFs| with conventional weaponry, |TSFs| possessing |what else TSFs have| the ability |TSFs| to |what else TSFs can (TSFs) do| transform into |what TSFs can (TSFs) transform (TSFs) into| oversized humanoid mechs |TSFs’ other forms| with |TSFs’ mech forms| all-purpose manuvarabilty, |TSFs’ mech forms| moving via |the means of movement for a TSF’s mech form| a combination of bipedal locomotion and rocket thrust, |TSFs’ mech forms| using stealth and superior mobility to |what TSFs’ mech forms utilize stealth and superior mobility for| outmanuering any opponent on the battlefield, |TSFs| from |which media franchise TSFs are (TSFs) from| the Muv-Luv franchise] were [TSFs] still [TSFs] developed in [when the TSFs were |the TSFs| created] the 1970s and [TSFs] used [TSFs] in conventional and low orbit warfare ever since, since the BETA [Muv-Luv] never arrived on Earth in this timeline, [TSFs] become an essential part of the military forces of the world's superpowers, with the end-stage Cold War restored Das Deutsches Reich and end-stage Cold War restored die Österreichisch-Ungarische Monarchie leading TSF creation, development and utilization due to the large amount of now ex-Soviet scientists, engineers and weapon developers within the Germanic sphere of influence with the end-stage Cold War restored Dai Nippon Teikoku/Dai Nihon Teikoku following close behind [in IS development and utlization] along with a resurgent British Commonwealth, with the USA being dead last in this field. 

The Nihon-jin dominate IS unit creation, development and innovation however, with their [the Nihon-jins'] IS Units seeing successful deployment against Maoist Huárén nationalist and supremacist anti-Nihon-jin rebels in Zhōngguó, communist restorationists in the post-Soviet Russkye East Coast and even against anti-Nihon-jin Hanguk-saram [Korean |Hanguk-saram|] nationalists and fascists in Chōsen, [the Nihon-jin] exploiting the connection between the IS Units and the Divas to create powerful Diva users.

The development of [what is developed Century Armament [a skintight combat bodysuit and weapon combination |a Century Armament| that |a Century Armament| enhances its |a Century Armaments'| users' strength, speed and agility a hundredfold and |a Hundred| can |what happens to a Hundred| be |a Hundred| activated as will with its |a Century Armament's| dormant state normally being a large jewel of some sort, |a Century Armament| from |the media franchise a Century Armament is (a Century Armament) from| Handoredd] as [what the Century Armament is (the Century Armament) developed (the Century Armament) as an improvement (the Century Armament) of in this timeline] the IS Unit as [what the Century Armament is (the Century Armament) developed for in this timeline] a means [the Century Armament] of [the Century Armament] combatting the relentless Savages [giant biomechanical automated insectoid war machines |the Savages| that |the Savages| have |what the Savages have| an extraterrestial origin, |the Savages| from |the media franchise the Savages are (the Savages) from| Handoredd] is [the development of Century Armaments] hidden from the global public along with the existence of [what else apart from Savages are hidden from the global public in this timeline]  the Variants [a human |a Variant| who |a Variant| has |a Variant| survived |what a Variant has survived| being infected with |the patheogon a Variant survived getting sick from| a near incurable deadly virus, which |a Variant's survival from the sickness given by the virus| grants him or her |a Variant| enhanced reaction time, speed and agility and various potent psychic powers in exchange for going berserk from the power they |a Variant| have, |a Variant| from |which series a Variant is (a Variant) from Handoredd] and [what else apart from the Savages, Variants and Century Armaments are hidden from the global public in this timeline] Seirei [Spirits |Seirei|,  extraordinary beings |Seirei| from |where the Seirei come from| a different dimension who |Seirei| create |what Seirei create| a Spacequake that |the Spacequake created by a Seirei| is |a Spacequake| similar to |what a Spacequake resembles| a bomb explosion which |a Spacequake| destroys everything that it |a Spacequake| engulfs whenever they |the Seirei| come through to this world, |the Seirei| from |the media franchise Seirei are (Seirei) from Date a Live], with special teams of young female mages and princess shrine maidens who are given military training by elite spec ops [special forces/special operations] and black ops [covert operations |black ops] units from around the world being given specially modfied IS Units and Century Armaments for the purpose of hunting Seirei. 

The rise of Gastrea [deadly parasites |Gastrea| that |Gastrea| transform |who Gastrea transform| their |the Gastrea's| victims into |what the Gastrea transform their (the Gastrea's victims) into mutated, superhuman, human-eating, powerful monsters (the endstage of a Gastrea infection), |the Gastrea| from |the media franchise the Gastrea are (the Gastrea) from| Black Bullet] and the Cursed Children [young girls |the Cursed Children| who |the Cursed Children| were |the Cursed Children| infected |the Cursed Children| with |the pathogen that infected the Cursed Children| Gastrea during or before gestation, |the Cursed Children having Gastrea inside of them| but |the Cursed Children| surviving |the Gastrea infection| and |the Cursed Children| gaining superhuman powers and animalistic traits from the disease |the Gastrea infection|, although they |the Cursed Children| remain mostly human, |the Cursed Children| from |the media franchise the Cursed Children are (the Cursed Children) from| Black Bullet] is [the emergence of Gastrea and the Cursed Children] also concealed from the global public with specialized TSF, Century Armament and IS Unit squads being deployed to wipe out Gastrea nests and Cursed Children being subjected to testing and experimentation to find out the source of their [the Cursed Children's] power along with the development of [what is developed to counter the Gastrea]  Kikai-Ka Heishi [Mechanical Solider |Kikai-Ka Heishi|, a formerly human cybernetic organism |a Kikai-Ka Heishi|, that |a Kikai-Ka Heishi| is |a Kikai-Ka Heishi| enhanced |a a Kikai-Ka Heishi| with |what makes a Kikai-Ka Heishi no longer a flesh and blood organism| immensely strong, durable, cybernetic replacement body parts that |a Kikai-Ka Heishi's cybernetic body parts| enhance its |a Kikai-Ka Heishi's| strength, speed, agility as well as |what else a Kikai-Ka Heishi has| rather strong psychic powers, |a Kikai-Ka Heishi| from |which series a Kikai-Ka Heishi is (a Kikai-Ka Heishi) from| Black Bullet]. 

 The Promoter [an individual |a Promoter| that |a Promoter| is |what a Promoter is| a person |a Promoter| who |a Promoter| is, |a Promoter| being |what a Promoter is| the supervisor |a Promoter| of |what a Promoter supervises| a 2-man combat team their |a Promoter's| partner normally being |what is normally paired with a Promoter| one of the Cursed Children, |a Promoter| in charge of |what a Promoter is (a Promoter) in charge (a Promoter) of| analyzing battle situations, |a Promoter| from |the franchise a Promoter is (a Promoter) from| Black Bullet] and Initiator [one of the Cursed Children who | an Initiator| is | an Initator| paired with |who an Initiator's partner is| a Promoter, | an Initator| from |the media franchise an Initator is (an Initiator) from| Black Bullet] system is [the Promoter and Initiator system] put in place to control the Cursed Children and [the Promoter and Initiator system] control them [the Cursed Children].

By the time Boku no Hero Academia, Black Bullet, Date a Live and Magika no Kenshi to Shōkan Vashireusu start in the 2020s, the world is in a tense balance in a three way cold war between a Germanic-dominated Europa, the British Empire, the Asian bloc and a weakened but still dominant USA.

The events described here all happen in chronological order and all happen within the same universe, so there is no dimensional crossing over or multiverse in this scenario.