The Oni Sisters of the Hidden Village ~Pleiades before after~

The Oni Sisters of the Hidden Village ~Pleiades before after~ (隠れ里の鬼姉妹 ~Pleiades before after~) is a limited edition short story that was handed out on a first come, first served basis to individuals who purchased over 3000 Yen of merchandise at the Tokyo Shibuya Marui department store during Ram and Rem's official birthday event in 2023.