The White Cat's Revenge as Plotted from the Dragon King's Lap: Volume 4

Ruri Morikawa manages to survive the assassination plot devised by the Church of God's Light and the pair of fake Reapers—leaving the castle of the Nation of the Dragon King in disrepair. With reconstruction underway, Ruri takes a trip to the Nation of the Beast King by suggestion of their Beloved, Celestine. With their efforts to find the Church of God's Light coming up empty, the rather egotistical Spirit of Fire, a supreme-level spirit, shows up at their doorstep. Will things proceed to heat up in the Nation of the Beast King? Or will they get too hot to handle?

[From J-Novel Club]