Duke Fleed is a survivor of the Fleed Planet who has escaped to Earth. Onboard a mysterious "spaceship," he is raised by Dr. Umon as his adoptive son, and becomes known as Daisuke Umon. Years after his arrival, he's faced with the threat of King Vega and his army, who want to conquer the Earth. With...
Source: MyAnimeList
Other anime produced by Gaina.
Availability may vary by region.
Kaishin no Ichigeki (会心ノ一撃)
Protect You
Ai no Uta (愛の歌)
Other anime that aired alongside Grendizer U.
