The White Cat's Revenge as Plotted from the Dragon King's Lap manga volume 3 features story by Aki and Kureha and art by Yamigo.

After discovering the horrific conditions in Nadasha, Ruri decides she can’t sit back on the sidelines any longer. Determined to prevent the outbreak of war, she’ll have to somehow convince the Priestess Priestess herself - Asahi. Can Ruri’s naïve and clueless childhood friend be made to see reason?!