Kidnapped by the mechanical rabbit Gorozou, Mameda, Shirara, and En'u find themselves in the city of the Moon Palace. In the Moon Palace, "laughing" has been forbidden for a long time following the Emperor's death. To reclaim their beloved disciples, the three masters, including the literary fox, rush to the clouds and confront the weaving princess to save the crumbling Moon Palace! Make the sorrowful princess smile and save the city of stars from destruction! Mameda and the literary fox take on a life-or-death stage in the Moon Palace arc, culminating in a grand conclusion!