Dragon Knight Gaiden
Genres: Action, Fantasy, Hentai
Type: OVA, Episodes: 1
Aired: Feb 25, 1995
Studio: Arms
Source: Visual novel
Rating: Rx - Hentai
Synopsis:
Takeru meets the boy Jodis which is in trouble for theft. Takeru saves him shares the night with him, finding out that Jodis is a girl. Later she is been kidnapped and Takeru goes to rescue her. 

(Source: AniDB)