アンジュ・カトリーナ(さんばか新衣装) 戌亥とこ(さんばか新衣装) リゼ・ヘルエスタ(さんばか新衣装)
The official alternate costume given to the members of Nijisanji's Sanbaka (Ange Katrina, Inui Toko and Lize Helesta) to celebrate their 3rd anniversary, as seen in post #3975366 and post #5254811. Designed by usasuzu, with Shigure Ui in charge of official illustrations.
It has an idol clothes theme.