"Shadows on the Isolated Isle"

Prompt: My OC. This place takes in a universe where they’re only women. They can have kids together and more than 2 parent can be the biological mothers. (they age really slow as adults and going to adulthood). And there is a school on an isolated island( big island) Most the girls at this school are orphans (unless those orphans had kids), and they are in a program where college students raise these orphans and the call the unnie and the orphans are their kouhou (and polyamorous relationships are normal so they might have a few unnies. They take the last name of one unnie. The kouhou call the other girls living with them their sibling. It’s normal for them to be in a relationship). The queen is Harumin Karin. Her wives are Emiko Yoshika and Kanade. Their biological kids are Haruka Yoshika (young adult but minor) Satsuki and maki Karin (high school students). And Harumin put her kids in the program ( Haruka started in last year of middle school and Aria started in forth grade) and Harumin also put her sister Aria Karin in the program(she’s younger than Haruka but she’s still an adult) . So Haruka is raising her sisters(but they switch weekly between Haruka and Aria’s house cause they both raising them) Haruka is in a relationship with Mai Sato, Ruka Takahashi,Yuu Tanaka, and Midori Suzuki. Their kouhou are, keade( oldest out of them) Saki, Nozomi, Susuki, Rin Sato ( Mai’s sister she calls her onee-chan, they also have another sister named Hanabi Sato who’s Aria’s age), Satsuki, and Maki. Aria is dating, Hanabi Sato , Sara, Noa,and Yui Sato. Their kouhou are, Kariun Sato, Mitsuki Sato, Yuki Sato, Rin Sato, Aya Sato, and Meirei Sato( their biological kid they had together)( they usually take the last name of one person. Mai, Yui , and Hanabi were raised together that why they share last names. They usually get taken in when they 3) This story revolves are Rin, Rin is sexually abusive to her partner. She made Aria( her main partner bleed, so Yuki (her older sibling) won’t allow her to have sex with Aya( same age as Rin). Susuki was the one who told on Rin, so Rin forced her to have sex, and made her bleed and got in trouble. So now she can’t have sex with either.) She’s been taking her anger out on Nozomi ( a year older than her) She been force fucking her ( Nozomi’s weak compared to Rin, so won’t fight back) in the room her and Saki shares. Rin would get mad if she isn’t quiet, cause Saki will get mad.