The Oni Sisters of the Hidden Village ――A Happy Bad Dream

The Oni Sisters of the Hidden Village ――Happy Nightmare (隠れ里の鬼姉妹 ――幸せな悪い夢) 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 Shibuya Marui department store, Tokyo, during Ram and Rem's official birthday event.

Characters

 * Rem
 * Ram
 * Natsuki Subaru