The Ninja Steel Rangers had successfully defeated Ripcon, one of their strongest enemies, and found out that Levi Weston, their gold ranger, was actually Aiden, Brody's brother. Madame Odius, another staff member of Galaxy Warriors, had created a fake Aiden robot, while at the same time, extracting the real Aiden's memories and placing them into the robot. When the robot was destroyed, Aiden's memories were restored. Now, they had gotten stronger after fighting many other contestants.
However, something happened one day. Brody, who was the red ninja steel ranger, saw a red portal opening. Akuroninja appeared in front of him and the other Ninja Steel Rangers. However, he knew he looked similar to the Ninja Steel Rangers, and he would use this to his advantage.
"You look similar to us!" Brody said.
"That's right," Akuroninja said. "I'm a Ninja Steel Ranger from the future! However, it's a terrible future! After you defeat Galvanax, an evil black ranger named Kuroninja will show up and destroy everything!"
Preston said "I think we saw this 'Kuroninja' before when fighting the Ninja Steel Rangers..."
Akuroninja said "Yes, he started off good, but he will become evil in the future! He will also join forces with 2 evil silver rangers and control a robot army!"
Akuroninja showed the Ninja Steel Rangers footage of Anti-Kuroninja, Cyber Kuroninja, and the Cyberninjas.
"These are the evil Rangers Kuroninja will side with when he becomes evil. You must destroy him, or else the future will be destroyed!" Akuroninja said, and then he disappeared in the red portal.
The Ninja Steel Rangers were convinced that they had to save the future by destroying Kuroninja.
Meanwhile, Kuroninja noticed that Cyber Kuroninja had the Hakucho Kyutama. He knew that the Hakucho Kyutama was part of a set of 3 Kyutama that didn't look very interesting, but when their powers were combined, they would show off a large amount of power. Kuroninja had one of these Kyutama, but he needed the last one so that he could defeat Cyber Kuroninja. Before leaving, Kuroninja decided to visit the Ninningers, in case they could get the Hakucho Kyutama from Cyber Kuroninja.
Kuroninja entered the house of the Ninningers and revealed himself to the Ninningers. Yakumo, also known as Aoninger, asked Kuroninja why he was here. Kuroninja said that there was something Cyber Kuroninja had that he needed. It was small and shaped like a globe, with an image of a swan on it. Takaharu, also known as Akaninger, told Kuroninja that he would get whatever Cyber Kuroninja had. Kuroninja didn't really like the idea of Akaninger using the power of the Hakucho Kyutama, but he couldn't find anyone else.
Kuroninja then left the house and got out the Time Shuriken. He was planning on travelling somewhere close to the future, but then he would combine his time travel abilities with his dimensional travel abilities to go to Earth-9. What Kuroninja was about to do wasn't going to be easy, because the last of these 3 Kyutama was in the hands of one of the Kyurangers.