Work Text:
Sometimes, you pretend to be your twin. It's nice to have people who don't know you assume that you are her, and compliment you. As Kasumi, you can be confident in a way that never feels right when you are Sumire.
Because you aren't confident. Kasumi is known for it. People expect her to be confident. And so, when you are Kasumi, you can borrow that, like you borrow her shirts or ribbons.
Just for a little while, and always with the expectation of giving it back.
You are twins, you share the same height, and close enough to the same body. Not identical, but close enough. So it always frustrates you that you can't do the same things.
For all your love of the craft, you are not as good as gymnastics as she is. She loves food, but lacks the patience to cook. You lack her confidence, and as you grow that turns to doubts and gloomy thoughts that grow like weeds. Or perhaps mushrooms, all connected in the roots, part of the same being.
As you grow, you identify this feeling as envy. You want what she has. Borrowing started as a small thing, but it grows as she does.
You try to let your sister shape you. You have let her design the bedroom, and plan many things about your (our) lives. You try to be the person your sister thinks you could be.
But you are Sumire and she's just not good enough. It's like the more you try, the worse you feel.
The last thing you borrow from your sister is not borrowed, it is stolen.
"I wish I were Kasumi"
And so you do your best to try to bury Sumire in her stead.