Your name is Y/N. You were born into a family of Nekoshou, a rarer kind of Nekomata. You had two sisters. Their names were Kuroka and Shirone. Both of your sisters had golden eyes, but Kuroka had black hair while Shirone had white.
Shirone was always quiet while Kuroka was loud. In a sense, they were each others opposites and you were the bridge to connect them. They were always affectionate with you in childhood, with Kuroka always setting you in her lap while petting your ears, and Shirone sat in your lap forcing you to pet her ears.
You were always a little intimidated by Shirone. She was such a forceful person when it came to you, and she always tried to make sure you only looked at her. All your childhood friends were scared away from you because Shirone threatened them, and she threatened you into never leaving her. Even after you were all taken in by a devil and Kuroka was turned into a reincarnated devil, she still kept you to herself, using her natural strength that opposed her small frame.
Shirone stayed by yourside every minute of ever day, even while you were showering or sleeping, she stayed with you. Shirone also hissed at any girls other then Kuroka that came close to you, scaring away many potential friends you could've had. You we're lonely, even if Shirone and Kuroka stayed by your side. Your life got repetitive quickly because when Shirone learned about some people being gay or Bi Sexual. She kept all genders away from you, except for, of course Kuroka.
One day, Kuroka was said to have went mad with power and murdered her master, though you doubted that greatly. Kuroka always had the utmost skill in keeping her power in check, and you watched her train with it. None of the general devil population knew this of course, and called for you and your twin sisters heads, believing that more of devils would die if the two of you were allowed to live. This wasn't true of course, but the devil population was frightened by Kuroka's powers and pushed that hatred onto the easiest targets, you and Shirone.
You were brought to a jail cell, though the guards let you stay together due to the glare Shirone gave them. You were even set to be executed together as some show of "niceness". You, of course knew that it was just to make sure one sibling didn't lose control because the first sibling died. As your heads were being laid against the guillotine you heard a mans voice yell out to stop, and immediately the executioners ran away from the guillotine.
"Release the girl, my sister wishes to add her to her peerage" The red haired man who had spoken this was easily recognizable by appearance. He was the Lucifer Satan, the strongest devil alive and hero of the great war. His words left a hidden undertone to them that the executioners noticed. 'the boy can die though'. Shirone called out to you, screaming your name and starting to let out wisps of magic. Sirzechs Lucifer knew that letting you die would cause Shirone to never listen to Rias, so he ordered the executioners to let you go too, if only to keep Shirone calm. You were both brought to the Gremory Estate in nothing but the prison uniforms.
Sirzechs led you and Shirone towards the the main lobby, where Shirone was told that she was going to meet her new master. Shirone stated that she was fine having a master, but only under the condition that you belonged to only her, and not her new master. Sirzechs, not really caring much about you allowed her request, and Shirone let out what could possibly be the biggest smile you had ever seen her use. After she signs the legal documents, you would belong to her and her alone, and you couldn't escape or the devils would hunt you down to finish what they started.
You were terrified of the future with Shirone as a devil. Before when she was just your twin sister, she kept everyone away and stuck to you like glue, but now that she owned you, she could keep you locked away or handcuffed to follow her around, and you couldn't say or do anything to counteract her orders.
You entered the main lobby and there was a small girl with red hair sitting there with a black haired girl. You assumed that the redhead was Lucifer's sister and your sisters new master, but you didn't know who the black haired girl was, but she was pretty. The redhead jumped to her feet when she saw your sister enter, already excited to induct the newest member of her peerage. Since she was a devil born of a pure-blood family, she already had her set of chess pieces, and only the queen piece was missing, presumably used on another person already. The red head introduced herself as Rias Gremory, and the black haired girl revealed herself as Sona Sitri, presumably the sister of the current Leviathan. Rias asked who you were when suddenly Shirone cut in, saying that that information is irrelevant. Rias looked to her brother quizzically, and he told her about the "special" arrangements between you and Shirone in exchange for her being a devil. Sona also seemed interested in you, but was quickly glared at by Shirone when said interest was noticed.
Rias got Shirone's attention and said something shocking. "Your new name is Koneko Toujou, as a symbol that you left your sister behind for a new life with me." Shockingly to you, Shirone, or Koneko now, nodded, already having all she needs in the form of owning you legally.
Rias asked what attribute Koneko would like to have added, and she immediately responded with strength, which meant bad news for you if she got it. She kept you with her enough with her current strength, If she got any kind of boost she would completely overpower you in anything, in worst case scenario she could molest you and you couldn't do anything to oppose it.
Rias pulled out what appeared to be a rook piece and told the newly named Koneko to lie down on the floor. Koneko dropped to the floor on her back, and Rias stood over her, placing the rook piece in between her breasts before standing up again and chanting some kind of speech to presumably revive Koneko as a servant. After the speech is done the Rook piece melts into Koneko's skin, presumably showing that it was done correctly. Koneko, after standing up stomped on the floor to test her power, and the floor broke and created a tiny crater. Koneko then grinned savagely at you, already thinking of the things she could do to you with that much strength. You, on the other hand pale in fear and start sweating profusely, looking over to the Lucifer next to you with pleading eyes. He simply shrugs his shoulders and pats you on the back.
Timeskip to nighttime
Koneko had filled out the paper work later that day that would legally make you her possession, someone that she can do whatever she wants to with no legal repercussions. Koneko dragged you all the way to her room, soon to be both your rooms, as she slammed the door open which was thankfully reinforced with steel, or you fear she would've tore it right off. Koneko pushes you onto the bed and says "Stay" with a withering glare, which causes you to freeze in fear on the bed. Koneko strips to the nude and orders you to as well. You hesitated, so Koneko slammed her foot on the ground, making a super loud thud that no one else heard because of soundproofing done to the room as well. You, being in the room heard how loud it was and understood the treat, 'Do what I say or feel pain!'
Do you
A: Follow instructions in hopes that she won't touch you too much tonight
B: Try to compromise with her to keep your clothes, which will probably just piss her off
C: Try to compromise with her to do nothing but sleep tonight, which will probably piss her off twice as much as before, maybe leading to reverse rape.