The default costume of Nijisanji EN's Shu Yamino, as seen in post #5090224 and post #5461527.
It consists of a sleeveless white shirt with wide detached sleeves and a detached frilled shirt collar adorned with a pair of demon wings, black high-waist shorts with gradient purple and white pantyhose underneath, a pair of black sandals that exposes Shu's purple toenail polish, a single earring on Shu's left ear, a pair of white half gloves, and a black corset.
This tag implicates shu_yamino (learn more).