Reunion After Twenty Years! Please Look After My Sister, Mr. Saeba (Part 1)
A woman named Sayuri Tachiki approaches Saeko with a request to meet her long lost sister, who happens to be Kaori. Because Kaori does not know the truth of her existence, Ryo decides to take Sayuri on as a "client" and have Kaori interact with her to see what happens. Ryo then notices that someone may be after Sayuri. When Sayuri notices that Kaori is training with a gun, she becomes angry at Ryo and fearful that her sister may end up with a horrible fate in the underworld.
Aired 21/04/1989EP 52 - Reunion After Twenty Years! Please Look After My Sister, Mr. Saeba (Part 1)
City Hunter 2
Ryo Saeba is a "sweeper" know as the City Hunter. He and his sidekick Kaori Makimura are hired to solve problems that the police can't (or won't) handle. When he's not keeping the streets of Tokyo clean, Ryo is chasing the ladies, and Kaori chases after him with a giant anti-ecchi hammer.
(Source: Anime News Network)