nishizono chigusa (3rd costume)

The third/idol costume of Nijisanji's Nishizono Chigusa, as seen on Twitter.

It consists of a black mini top hat worn on her right side, white and black layered dress with a cleavage cutout and puffy short sleeves, blue necktie, black thighhighs, and white shoes. Her hair is tied with a single side bun on her left.