The thinnest sundress Yuki had ever seen.

Yuki had felt a brief moment of relief when Rei seemed to relent, agreeing to let her wear something. Rei had, of course, ordered Yuki to stay put while she went and picked out something for her to wear. It was during that wait that Yuki began to feel the gnawing worry of how her sister would twist this seeming concession into a way to make things worse for her instead.

"Here you go, nerd." Rei said as she returned to the front of the house, handing Yuki a bundle of fabric.

Yuki quickly held out the garment to see what Rei had grabbed, and her heart sank. In her hands was a pale blue sundress, but Yuki gasped when she realized the fabric was scandalously thin. While it would hide details, it would be easy to discern the silhouette of her body through the fabric; only the bare minimum would be left to the imagination. Yuki cast a pleading glance in Rei's direction, only to be met with a stare that she knew would tolerate no argument. Instead, she resigned herself to pulling the excuse for a dress on, only to discover another problem.

The dress was obviously Rei's, partly because Yuki knew she'd never buy something like this, but also because it was not a proper fit for Yuki's body. While Yuki had a respectable c-cup chest she was proud of, Rei boasted a surprising 34D chest, on top of being a few inches taller than her younger sister. As a result, the fabric was worryingly loose around the chest, and the neckline fell lower than Yuki would have liked.

"...You suck, Rei." Yuki muttered, even as she accepted her fate.

"Nah. I rule." Rei shot back. "Now come on, let's go enjoy the fresh air and summer breeze! If you're good, I may even give you an accessory or two."