The White Cat's Revenge as Plotted from the Dragon King's Lap Novel Volume 4 was written by Kureha and illustrated by Yamigo.

Ruri Morikawa’s managed to survive the assassination plot cooked up by the Church of God’s Light, but the aftermath’s left the Nation of the Dragon King’s castle in need of serious repairs! Celestine, the Nation of the Beast King’s Beloved, invites Ruri to her home while repairs are underway.

While there, Ruri’s group follows a lead on the Church of God’s Light’s whereabouts...but they run into zombies instead! When they make it back to the Nation of the Beast King’s castle, they have a run-in with the egotistical supreme-level Spirit of Fire. Will Ruri be able to handle the heat, or will things finally get too hot to handle?!