Write an interesting, dialogue-filled excerpt for a crossover fanfic between the Onii-chan, Asa made Zutto Gyutte Shite! Visual novel and hentai franchise, the Zetman anime and manga franchise and the Taimanin Asagi franchise in which the ordinary middle-class family of scientists in which the events of Onii-chan, Asa made Zutto Gyutte Shite! revolve around, the Onamis, are in fact the wealthy Japanese industrial and financial based family who created and own the Japanese-originating, Japan-based industrial, electronic, print, defense and arms mega conglomete of the Amagi Corp of the Amagis [ZETMAN] with the experiments being conducted on the brown-haired, blue-eyed, tall and slender male protagonist of Onii-chan, Asa made Zutto Gyutte Shite! who [the protagonist] is called Tatsuya in this story are [the experiments done on the male protagonist] done utilising the research from the Amagis' private scientific project aimed at creating the perfect human, Project NET [Zetman] with the protagonist's younger sisters: the brown haired, green eyed, short and petite but also rather buxom, intellectually giftted and academically brilliant but also shy and softspoken Sora, who is the oldest of the sisters, the black haired, blue eyed, short and petite but also buxom, kind and softhearted housewife in training Kohaku, who is the second oldest of the sisters, the black-purple haired, red-violet eyed, formal, polite and soft spoken Akane, who is the third oldest of the sisters, the blonde haired, Amber eyed, short and petite, kind-hearted and shy, Sumi, who is the youngest of the sisters [Sora, Kohaku, Akane and Sumi] in fact being failed prototypes of an improved version of Project NET after the only successful product of PROJECT NET, the black haired, brown eyed, tall, slender and muscular, sarcastic and reserved but brilliant and kind hearted Street child turned vigilante Kanzaki Jin [Zetman] was [Jin] rescued as a baby [Jin] from the Project site by the Amagi's top scientist, Kanzaki Gorou. 


The older Amagis [the protagonist's, Sora's Kohaku's, Akane's and Sumi's shared parents/Mr and Mrs/Onami/Amagi]  of course were  [the protagonist's, Sora's, Kohaku's, Akane's and Sumi's shared parents/Mr and Mrs/Onami/Amagi] clueless about this and [the older Amagis] took in the girls who would become Sora, Kohaku, Akane and Sumi as they [Sora, Kohaku, Akane and Sumi] came off the production line in an attempt to replicate the power of ZET [what Jin was called as the finished product of Project NET], [the older Amagis] assuming that Project NET was just harmless research into genetic manipulation. 
As the girls grew, they developed various abilities and powers: Sora developed electrokinesis and incredible speed, Kohaku developed water manipulation and ice manipulation, Akane developed pyrokinesis and electrokinesis, and Sumi developed incredible agility and flexibility. Of course the girls kept these abilities hidden from their parents and their [Sora's, Kohaku's, Akane's and Sumi's] beloved older brother [the protagonist]. 

All four girls found themselves [Sora, Kohaku, Akane and Sumi] involved with the semi-secret, part-NGO, part-Japanese governmental Taimanin organization of yokai [monsters |yokai|], ayakashi [sentiment, self-aware animals with the ability to transform into a human, anthropomorphic or animalistic human form and also to use youki |monster energy|] and oni [ogres] who [the members of the Taimanin] act as shinobi [ninja |shinobi|] hunting other yokai, ayakashi and oni either on a contract from the Japanese government or for the protection of humans, [Sora, Kohaku, Akane and Sumi] eventually joining the Taimanin and [Sora, Kohaku, Akane and Sumi] rising through the ranks. 


The excerpt should focus on a surprised Tatsuya trying to understand what is going on after he [Tatsuya] stumbles upon Sora changing out of her [Sora's] Taimanin outfit, which [Sora's Taimanin outfit] is a form-fitting, bullet and blade-proof, speed and agility enhancing black and red leotard-like battle suit with exposed shoulders and upper legs and [Tatsuya] turning around only to see Kohaku, still in her [Kohaku's] Taimanin outfit of a purple bodysuit with gold accents on the edges, golden pasties on the tips of her breasts, an opening in the center of her bust, silver armored gauntlets and leggings and Sumi, who [Sumi] is [Sumi] still in her [Sumi's] Tamanin outfit of a form-fitting, skin tight, bullet and blade proof bodysuit, [Sumi and Kohaku] carrying away the dead body of what is obviously an assassin sent by the KKK as Sumi whines about the Sons of the Confederacy not sending their best and Kohaku making a snide comment about the moonshine ruining their [the KKK's] brains.