An exclusive preview for the new animated film of the series took place in Tokyo. Before the film screening, several voice actors appeared on a stage.

The involved voice actors commented on the completed scenes and their work on the roles. One participant, who described herself as a long-time fan of the series, expressed her delight at being involved. Another voice actor described the challenge of portraying a character in such a popular story.

The conversation also touched upon the relationships between the characters, as well as hints at new plotlines within the film's story. The event concluded with a symbolic toast to the completion of the work.

The film is based on the original story by Fuse and Taiki Kawakami.