出崎統
To serve as sequels to the anime series and to conclude the manga story, two original video animations (OVA) were produced. The first OVA, , which consists of thirteen episodes, was produced by Tokyo Movie and directed by Noboru Furuse. It was released by Bandai Visual between July 25, 1988, and October 25, 1988, on six VHS videocassettes, and as a DVD compilation on May 23, 2005. It was also released in France by Manga Distribution in 2008. The first OVA was followed by , which consists of 12 episodes directed by Osamu Dezaki. It was originally released by Bandai Visual into six VHS videos from October 23, 1989, to April 24, 1990, and a DVD box set was released on September 26, 2003.