Yingxiong Zai Lin
English title: Hero Return
Japanese title: 英雄再临
Type: ONA
Episodes: 12
Source: Novel
Genres: Action, Sci-Fi
Studios: Big Firebird Culture
Producers: Tencent Penguin Pictures
Duration: 16 min per ep
Rating: R - 17+ (violence & profanity)

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)