setsuna (3rd costume) (nijisanji)

The 3rd and final costume of Nijisanji's Setsuna, as seen in example Danbooru post #3726879.

It is comprised of a black hoodie, white crop top, white shorts, and has headphones around her neck. Her hair is also tied to a ponytail style.

This tag implicates setsuna_(nijisanji) (learn more).