White Cat's Revenge as Plotted from the Dragon King's Lap: Volume 6

Since she married the Dragon King Jade, Ruri spends every day in happiness as Jade dotes on her. One day, Jade asks her to accompany him to a meeting of the four biggest nations in the world. It's being held in the Nation of the Spirit King, so Ruri hopes to enjoy a newlywed trip through the kingdom. However, her hopes are dashed when a sacred beast cub is kidnapped! And Ruri, having been the last to see the sacred beast just before its abduction, is suspected of the crime! What fate will befall Ruri in this new adventure?!