Ai Zai Xiyuan Qian
Japanese title: 爱在西元前
Alternative titles: Immemorial Love For You
Type: ONA
Source: Music
Episodes: 12
Status: Finished Airing
Aired: Jul 13, 2019 to Aug 31, 2019
Duration: 14 min per ep
Rating: PG-13 - Teens 13 or older
Studios: Taikong Works
Genres: Action, Fantasy, Romance, Sci-Fi

Some aliens come to the Earth and one of them, become Babilonia's King, building the Babel Tower in order to come back to his world. But, due to technical failures his spaceship explodes, killing the main female character. The male lead and his troop stay in the Earth to find a way to come back. The female main character reincarnates 2500 years ago and met with him one more time. Then, what will happen now? 

(Source: tvtime.com)

Based on Jay Chou's (周杰伦) song of the same title which was released in 2001.