Joker: Marginal City
Genres: Action, Romance, Sci-Fi
Type: OVA, Episodes: 1
Aired: Apr 21, 1992
Studio: Studio Sign
Source: Manga
Rating: R - 17+ (violence & profanity)
Synopsis:
OVA based on the Joker manga by artist Katsumi Michihara (道原かつみ) and writer Yuu Maki (麻城ゆう).

Joker is a genetically engineered shape-and-gender-shifter, who created as part of a Special Police Task Force and fights crime of all kinds, but he/she also fits in a little romance around the edges.

(Source: AniDB)