City Hunter Movie: Tenshi no Namida
English title: City Hunter The Movie: Angel Dust
Japanese title: 劇場版シティーハンター 天使の涙 (エンジェルダスト)
Type: Movie
Source: Manga
Episodes: 1
Status: Finished Airing
Aired: Sep 8, 2023
Duration: 1 hr 33 min
Rating: PG-13 - Teens 13 or older
Studios: Sunrise, The Answer Studio
Producers: Aniplex, Audio Planning U
Licensors: Anime Limited
Genres: Action, Mystery
Themes: Adult Cast
Demographics: Shounen

It is based on the manga finale, where Ryo Saeba faces his dark past that his former mentor and adoptive father Shin Kaibara from now on leader of Union Teope would want to kill him, as the people who are injected with nanomachines to become super soldiers, aka Angel Dust, are starting to kill him.

(Source: City Hunter Wiki)