Not Yours

Genderbend Au again bc I like it. Gives everything a new perspective, plus I don't do it a lot.
This story is starting with Giyuu, she is in her estate and we go through her day to day life, almost like a programming, until one day something breaks her boring life, you see she is actually secretly engaged to a cruel man that she was sold to, he threatens her to become his through marriage, she has to say yes. The other hashiras feel as if they can't intervene since they are rightfully engaged and there is nothing they can do about it, but one of them who has hook up sessions with Giyuu once in a while feels as if she can't sit there and watch as Giyuu is forced into a marriage with such a cruel man.