Yingxiong Zai Lin
English name: Hero Return
Genres: Action, Sci-Fi
Type: ONA, Episodes: 12
Aired: Oct 18, 2020 to Dec 27, 2020
Studio: Big Firebird Culture
Source: Novel
Rating: R - 17+ (violence & profanity)
Synopsis:
Zero was mankind’s first real superhero. Under his watch, countless other superheros appeared and followed in his footsteps. However, after 5 years of war, Zero disappeared without a trace.

(Source: zeroscans)