Yao Shen Ji
English title: Tales of Demons and Gods
Japanese title: 妖神记
Alternative titles: Demon Gods
Type: ONA
Source: Novel
Episodes: 40
Status: Finished Airing
Aired: May 9, 2017 to Sep 22, 2017
Duration: 8 min per ep
Rating: PG-13 - Teens 13 or older
Studios: Ruo Hong Culture
Genres: Action, Adventure, Fantasy, Romance
Themes: Martial Arts, Mythology

In his past life, although too weak to protect his home when it counted, out of grave determination Nie Li became the strongest Demon Spiritist and stood at the pinnacle of the martial world. However, he lost his life during the battle with the Sage Emperor and six deity-ranked beasts.

His soul was then brought back to when he was still 13 years old. Although he's the weakest in his class with the lowest talent, having only a red soul realm and a weak one at that, with the aid of the vast knowledge which he accumulated from his previous life, he decided to train faster than anyone could expect. He also decided to help those who died nobly in his previous life to train faster as well.

He aims to protect the city from the coming future of being devastated by demon beasts and the previous fate of ending up destroyed. He aims to protect his lover, friends, family and fellow citizens who died in the beast assault or its aftermath. And he aims to destroy the so-called Sacred family who arrogantly abandoned their duty and betrayed the city in his past life.

(Source: Goodreads)