Kuroninja, a mysterious warrior has earned his title as an Extra Ranger for Super Sentai. He earned that title by completing 4 "ninja trials," which involved reuniting the Hanarangers. However, they could only be found after completing certain trials, which tested Kuroninja's speed, logic, strength, and skill. Now, Kuroninja was able to open a dojo so he could teach other potential ninjas his Kuroninja ninjutsu techniques. Kuroninja already had an apprentice. Her name was Luna Kokonoe.
Elsewhere, the Ninningers decided to part ways after all 6 of them earned the title of "Last Ninja." They had defeated the evil Youkai warlord, Kibaoni Gengetsu, and his other subjects. The firstborn son of Kibaoni Gengetsu, Kibaoni Shingetsu, was formerly the apprentice of the mentor of the Ninningers, and he became evil, taking the name "Izayoi Kyuuemon." Kyuuemon helped the Kibaoni Army Corps, until the final battle, where he changed sides. His last gift to the Ninningers was a lime green shuriken.
Meanwhile, the enemy of Kuroninja, also known as Anti-Kuroninja, was planning something. He had gathered masks from the ruins of the fortress of the Kibaoni Army Corps. Anti-Kuroninja looked like Kuroninja, except he was light grey and more evil. Anti-Kuroninja was planning to get his revenge on Kuroninja, but he needed reinforcements. The masks could help, as they could revive the more powerful warriors that worked with Kibaoni Gengetsu. However, Anti-Kuroninja was missing something. He needed the fear of others. Anti Kuroninja pulled out a shuriken surrounded by dark blue fire, and threw it at some random objects to create Youkai. The Youkai were sent to attack so Anti Kuroninja could gather fear from the humans. With that fear, Anti-Kuroninja could revive two generals from the Kibaoni Army Corps.
