The original default costume of Nijisanji's Matsukai Mao, as seen in post #3675694. She used this from November 2010 to June 2024, when she replaced it with a new default.
It consists of a black crop top, white shorts, white Letterman jacket worn off shoulder, thigh straps, striped legwear thighhighs, sneakers, fake cat ears, and a spiked collar.
This tag implicates matsukai_mao (learn more).