asahina akane (3rd costume) (nijisanji)
The third (and final) costume of Nijisanji's Asahina Akane, as seen in post #6305482.
It is composed of a blue crop top, white jacket, two-layer black skirt (with the outer one having a side slit), bead bracelet and belt, and a chain necklace.
This tag implicates asahina_akane_(nijisanji) (learn more).