The original costume of the Indie VTuber Vienna, as seen in post #5315416.
It consists of a cropped white camisole and white pants with a black fur-trimmed jacket worn off shoulder, a detached collar, and a pair of black boots. In this look, Vienna has very long hair loose hair.
She later received an update to this costume, as seen in post #5370184, that gave her the option to replace the original jacket with a red hooded jacket and switch her hairstyle to twintails.
This tag implicates vienna_(vtuber) (learn more).