As Takeru prepares to duel with Juzo, Doukoku, furious with Dayu for not killing Juzo as he had commanded her to do, setting fire to her beloved shamisen when she was provoking him to kill her. A devastated Dayu flees into the mortal realm to search for ideal victims with which to repair her damaged instrument. She runs into Mako, and the two battle until the Ayakashi Yumebakura arrives. Yumebakura attempts to put Dayu into a deep sleep, but when the Shinkengers arrive, Dayu escapes. Shinken Pink and Shinken Yellow give chase. Genta arrives, but Yumebakura puts him to sleep, then uses him as a gateway to Dayu's location. This time, Yumebakura succeeds in sending Dayu, as well as Shinken Pink, into the Dream World. There, Mako discovers Dayu's past; she was once a human woman named Usuyuki. Obsessed with a man named Shinsa, who spurned her for another, Usuyuki crashed his wedding reception and set fire to the building, killing herself and everyone inside. Enraged that the dying Shinsa still favored his bride over her, Usuyuki pulled him to her, determined to have him be hers in death. As she fell to the Gedoushu, Usuyuki was reborn as Dayu and Shinsa was transformed into her shamisen. Meanwhile, Shinken Blue and Shinken Green enter the Dream World to bring Yumebakura back into the real world to awaken his victims and break his hold on them. Now that Mako knows her past, Dayu moves to kill her. Mako hesitates, so Kotoha jumps in to defend her and is injured. Shitari summons the ?nanashi and ?nosakamata, so Shinken Red and Shinken Gold form Daikai-Shinkenoh to fight them. Though victorious, the two Shinkengers are thoroughly exhausted from their battle. To make matters worse, Juzo shows up, intent on fighting Takeru, right then and there.