aia amare (1st costume)

The default costume of Nijisanji EN's Aia Amare, as seen in Danbooru post #5524705.

Her default ILUNA school uniform costume is composed of a collared long-sleeved white dress under a large red bowtie and a black corset, with the skirt part are patterned and partially has grey chekered segments. Aia also wears a pair of white half gloves, a white pantyhose, a pair of white and black high heels, a single earring, a detached black collar and a number of chains and jewelry on her costume. She is often seen carrying a green book.

This tag implicates aia_amare (learn more).