What if the light novel, manga and anime franchise Masou Gakuen HxH instead had a modernized version of the plot of  the 1994 superhero science fiction horror live action movie Guyver: Dark Hero, a live action adaptation [Dark Hero] of the Guyver anime and manga franchise, with the tall, slender and muscular, black-haired, blue-eyed young Japanese boy Hida Kizuna [Masou Gakuen HxH], the protagonist [Kizuna] of Masou Gakuen HxH, [Kizuna] not having the Eros HxH Gear [Masou Gakuen HxH] and [Kizuna] instead bonding with the Faiz Gear [Kamen Rider 555], which [the Faiz Gear] is the man-man artificial equivalent of the canon Guyver units in canon Guyver with the basic features of a Nanosuit 2.0 [Crysis] and those of an IS unit, [Kizuna bonding with the IS unit] when he [Kizuna] was just a young boy and [Kizuna] subsequently becoming the target of the British-origin and British-based megacorp and covert defence contractor/arms merchant/arms manfacturer, Umbrella Corporation [Resident Evil], which [Umbrella Corporation] replaces Chronus Corporation [Guyver] and Smart Brain [Kamen Rider 555], which [Umbrella] is [Umbrella] secretly controlled by the Hollows [Bleach], which [the Hollows] are the same [the Hollows] as the undead revenants known as Orphenoch [Kamen Rider 555] and [the Hollows] replace the genetically engineered monsters that were once humans known as Zoanoids [Guyver], which he [Kizuna] hides from his [Kizuna's] older sister, the black-haired, blue-eyed, tall, slender and very curvy and buxom, stern, serious and determined but also hot-tempered, very-perverted and seductive Japanese noble heiress Hida Reiri [Masou Gakuen HxH], who [Reiri] becomes his [Kizuna's] legal guardian [Reiri] after their [Reiri's] shared mother, the black-haired, blue-eyed, tall, slender and buxom, cheerful and happy-go-lucky infamous, intellectually gifted and academically brilliant but also mentally unstable mad scientist Hida Nayuta [Masou Gakuen HxH] whom [Nayuta] is [Nayuta] really the human form [Nayuta] of [Nayuta’s true self] the Greek mythological God of Death Thanatos, whose [Thanatos’] true form is [Thanatos’ true form] revealed to be a buxom, tall and curvy, blonde-haired, blue-eyed woman with the look of a stereotypical Angel and the ability to control machines as well, although only Reiri suspects this [Nayuta not being human] at first, [Nayuta] disappears when Reiri is just a teenager and Kizuna is just a young boy, with the extradimensional, fantasy feudal Europe-based, steampunk, clockpunk and dieselpunk-technology having, mostly dragoness in human form and monster girl with a smattering of magically empowered female human-populated Batlantis Empire [Masou Gakuen HxH] invading Earth soon after, with the UN and Earth's governments covering up the invasion as a series of worldwide terror attacks. Japan, which [Japan] in this scenario regained Korea, Taiwan and Formosa as provinces at the end of the Cold War and [Japan] became the world’s sole superpower after the Cold War, [Japan] restoring the pre-WW2 and WW2-era protectorates of the Manchu Imperial House of Aisin-Gioro ruled Empire of Manchukuo in Manchuria and Outer Mongolia and the Mongolian Imperial House of Borjigin-ruled Mongol Autonomous Federation in Inner Mongolia’s Chahar and Suiyan region along with [Japan] the Beiyang Government of the Republic of China as a restored Yuan Shikai-created Empire of China ruled by the imperial family of the pre-Qing Chinese dynasty of the Great Ming State, the Imperial House of Zhu in the eighteen provinces of the Han dynasty, [Japan restoring] the partially Japanese Han Chinese Zheng-dynasty-ruled Ming rump kingdom of the Kingdom of Tungning in Cantonia, the Turkish Imperial House of Osman-ruled Ottoman Empire in East Turkestan and [Japan restoring] the Llama-ruled Kingdom of Tibet in Tibet along with [Japan restoring] the post-WW1 short-lived Japanese protectorate of the Far Eastern Republic on the Russian East Coast with the USA being a Japanese colony in all but name before the events of this version of Masou Gakuen HxH start and also before Reiri's birth, [Japan in this scenario] being able to [Japan] quickly repel the threat, Japan turning Association of Southeast Asian Nations [ASEAN] into a modern day version of the Greater East Asian Co-Prosperity Sphere and [Japan] quickly transforming the floating city of the future, Ataraxia [Masou Gakuen HxH] into the Earth's last line of defence against Batlantis as Reiri, who [Reiri] has her [Reiri's] mother's [Nayuta's] intelligence and charisma, [Reiri] rises through the ranks of Ataraxia to [Reiri] become its [Ataraxia's] commander.