Though I Am an Inept Villainess: Tale of the Butterfly-Rat Body Swap in the Maiden Court (Light Novel) Vol. 4

Just when Kou Reirin has gotten the dysentery outbreak in the Untouchable Village under control, the village chief mysteriously shows up on death's door. Reirin fights tooth and nail to keep her new friend alive--but it might not be enough to get him through the night. Meanwhile, Shu Keigetsu is all fired up and ready to get her tea party for the Maidens underway. Now that the outwardly meek Ran Houshun has shown her true colors, it's time to best her in a game of psychological warfare!