In Japan, in a film studio, there was an Idol Group known as the NinninGirls, with only two members: Fuuka Igasaki and Luna Kokonoe. Fuuka was the sister of Takaharu Igasaki, also known as Akaninger. She also fought with the Ninningers as Shironinger. Luna was a new member of the NinninGirls, who used to be the apprentice of black ninja ranger known as Kuroninja. She was given the Midoninger Shuriken, which used to contain the soul of Kyuuemon Izayoi, who wished to fight by the Ninningers one final time.
Kuroninja was a ninja who used the same style of ninjutsu as the Ninningers, but rarely met them. The Ninningers were shinobi who didn't hide, but Kuroninja preferred the traditional ninja method of hiding. He referred to himself as the hidden ninja of shadows. However, Kuroninja wasn't lonely. He had earned his place as a Sentai Ranger during a time when he used to fight alongside five other ninjas. These five ninjas used to be loyal to the Youkai back when they were led by Daimaou. However, when Daimaoh was sealed away by an old Sentai Team, the five ninja were turned into cats, which was their original form, as they were given human form by Youkai power.
After the Ninningers defeated Mangetsu Kibaoni and Kyuuemon returned to the spirit world, Luna left Kuroninja and no longer became his apprentice. Kuroninja knew that if he loved someone, he would have to set them free. But that was when a cat with a blue ribbon appeared in front of Kuroninja. This cat was one of the five ninjas that formerly served the Youkai. Now, Kuroninja was in Egypt, trying to find a temple for an Egyptian cat Youkai, to try and turn her into a human. The reason why was because the Ancient Egyptians worshipped cats.
Anyway, the NinninGirls' producer was Nagi Matsuo, also known as Kininger. He noticed that some intruders were in the building. The three ninjas transformed into Ninningers to try and take down the intruders. The intruders turned out to be a group of people working for the Cyberninja Tech Company, who were sponsoring the "GW Ninja Tournament." Nagi had no idea what GW meant, so he felt suspicion. One of the people said that it was a tournament where certain ninjas would be selected to participate in an epic battle against others with similar appearances and abilities. They then showed two videos: one was a video of Quester Gai battling Hiramechimedes in a gladiatorial match, and the other was a video of Brody Romero, the red ninja steel ranger, transforming and finishing off someone who looked like Quester Gai. Nagi accepted, and went to the others to tell them how they were selected into a ninja tournament.
Meanwhile, Anti-Kuroninja was in an airport, waiting for a plane to arrive from Japan. However, at the same time, a plane was arriving from Egypt. Anti-Kuroninja's arch-enemy had returned, and that was bad for his plan.
