Format
Movie
Episodes
1
Episode Duration
50 min
Status
Finished Airing
Premiered
Aired
2017-12-02 to ?
Source
Manga
Rating
PG-13 - Teens 13 or older
Genres
Action
Historical
Supernatural
Studios
Wit Studio
Producers
Production I.G
Shochiku
Blade
Kinoshita Management
Licensors
Eleven Arts
Donten ni Warau Gaiden: Ketsubetsu, Yamainu no Chikai (曇天に笑う<外伝> ~決別、犲の誓い~)
One year has passed after the great battle against the "Orochi" (gigantic snake). Tenka had been paralyzed from the final battle and he took part of the government's human experiment before the battle. Tenka withdrew himself from society, but his younger brothers, Soramaru and Chuutaro, find out the secret past about their older brother. (Source: Amazon Prime Video)