Big Brother is a oNA (web) anime, produced by Sparkly Key Animation.

About the production: the story comes from a other, there are 13 episodes of about 20 minutes and its current status is "finished".

Its main genres are action, adventure, fantasy and romance, with themes such as Martial Arts, Swordplay, Male Protagonist and CGI.

On AniList, Big Brother has an average score of 73%, a good score, and appears on 1,154 users' lists.

The franchise continues in or follows from: Shixiong A Shixiong 2.

After being reborn in ancient times before the Fengshen War, Li Changshou became a small-time cultivator. To survive in the cruel Primordial Times, Li Changshou tried his best not to get involved in any conflicts and never allowing himself to walk into dangerous situations. His plan was to hide away in the mountains and quietly cultivate his way towards immortality. However, everything changed one day when his master brought back a young girl to be a new apprentice under him… (Source: Bilibili, translated)

Official synopsis from AniList.