Overview
- Official materials released on Friday include a teaser trailer, key visual, poster and new character designs to promote the film.
- Author Hyūganatsu wrote the movie as an original story and confirmed it sits chronologically between seasons two and three, corresponding to roughly Volume 4.5 of the novels.
- The plot follows Maomao and Jinshi escorting the remains of a mid‑ranking consort and investigating a mystery connected to a young boy identified in promos as Mu Qing.
- Voice actress Mariya Ise is confirmed to play the new boy character and the film will open in Japanese theaters on December 11, 2026.
- No international theatrical or streaming dates have been announced yet, a common rollout pattern for anime films that suggests global windows may be revealed after the Japan run.