Yuni's Little Sister

Standard blurb: Mu Yu is an onmyoji. Yes, a very traditional one. She's also the textbook definition of a poker face. She has a mother who is obsessed with her big sister. She has a big sister who's obsessed with a strange man (according to Mu Yu). So please call her Mu Yu, the neglected (though not really) and self-sufficient girl. Oh, I forgot to mention: her sister is called Yuni, and her mother is called Aria. CP blurb: Yuni didn't know when she fell in love with her little sister. Perhaps it was when her sister stood up for her and hit back hard after she was bullied as a child... Perhaps it was when her sister pricked all ten of her fingers making her a blue hair tie... Perhaps it was just the days they spent together... As long as you keep looking at me, that's all I need... Yuni took Mu Yu's hand. Beneath the setting sun, their shadows stretched long and longer... This is yuri! This is yuri! This is yuri! Important things have to be said three times! Original female protagonist, paired with Yuni, shou protagonist. Yuni is reborn and may become dark. She may be OOC, and she's not especially saintly. If that's not your thing, please move along! Since there aren't any stories with a princess, I can only write one myself...