Shixiong A Shixiong
English title: My Senior Brother Is Too Steady
Japanese title: 师兄啊师兄
Type: ONA
Episodes: 13
Source: Web novel
Genres: Action, Adventure, Fantasy
Studios: Sparkly Key Animation Studio
Producers: Youku
Duration: 20 min per ep
Rating: PG-13 - Teens 13 or older

After being reborn in ancient times before the Great God-Conferment War, Li Changshou became a small cultivator.

To survive in the cruel Primordial Times, Li Changshou tries hard not to accumulate any karma. He always plans thoroughly before doing anything and never allows himself to walk into dangerous situations. He hides his trump cards well, trains himself in escape techniques, refines poisonous pills, and masters mystical abilities.
Li Changshou originally planned to remain hidden and safe in the mountain until his ascension to immortality. However, everything changed one year when his master brought home a junior sister…

(Source: Realm Scans)