The story follows a group of baseball players who after having quit playing baseball are reunited by fate after enrolling in the same high school. At the time the school did not have a baseball team, so the group who have previously faced off against each other throughout the years form a team and start playing once again, reviving their passion for the sport.
In the spring of 1975, peace returned to the universe once more. But then members of the Ultra Brothers started being murdered by someone, one by one. The perpetrator was Jackal the Demonic Space Overlord. Just when it seemed all hope was lost, a mysterious warrior wearing a suit of armor that obscured his identity appeared from the heavens…