The three brothers discover that the human experiment banned after destroying the "Orochi", is still going on to secretly revive the evil snake. They also find out that some ex-members of the Yamainu (the Japanese military unit formed to kill the snake) are behind this conspiracy. The brothers fight together again in a battle against the military.
Synonyms: Donten: Laughing Under the Clouds - Gaiden: Chapter 3 - Conspiracy of the Military, 曇天に笑う<外伝> ~桜華、天望の架橋~
Status: Finished Airing
Country: Japanese
Released: 2018
Season: Movie