This ensemble is marketed as a hot little cosplay costume, or "everyday flirty wear." When your anime-inspired dress-up gear becomes your daily wardrobe, you need assistance.
This is a line called Resetcouture. On the site it's trademarked. Something tells me they don't need the legal protection against copycats.
Like the sleeve of a wizard.
If you want any of these items, may god bless you, and you can find more information by clicking on any of the hot, messy images. Stay tuned for the kid's edition of Fun With Etsy! It'll be great.