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The third costume for hololive's Shishiro Botan, as seen in Danbooru post #5838110 and Danbooru post #5838115.
This costume has 2 different variations for the top:
Both versions share the same bottom consisting of a pair of black short shorts with legwear garters/thigh straps, black pantyhose, and black lace-up ankle boots.
Her official hairstyles with this costume are either very long straight hair with hair flaps and sidelocks, or short streaked hair with asymmetrical bangs covering her right eye.