Lesson 33: Fure-Fure Gatchiri! Kung Fu Chūshingura

'''Fure-Fure Gatchiri! Kung Fu Chūshingura''' is the thirty-third episode of Engine Sentai Go-Onger.

Plot
Rageku's Secret Ringi sends the Gekirangers to January 30, 1703 at the time of the Edo Era, with Rio and Mere nowhere to be found. But a scream attracted their attention and found Rin Jū Anglerfish-Ken user Mukoua as he emerged from the body of Kira Yoshinaka and wounded Mōri Koheita to take the item he had, revealing that he is here on orders to keep the gang trapped in time. The Gekirangers take the boy's scroll to Lady Yōzeiin, the wife of the late Asano Naganori, who reveals that Ōishi Yoshio and his 47 Ronin followers are to finally avenge their master this night. Hearing the rumors of Kira's possession true, Yōzeiin pleas the Gekirangers to remove the "evil spirit" before the Akō Rōshi Raid begins. While getting ready, the guys find Mere who is tending to Rio and his memory loss, revealing SoZyuTo gone. Realizing the item Mukoa stole is the SoZyuTo, the Gekirangers arrive to find Kira, fighting their way through Kira's houseguard with their kung-fu skills. The search seemed hopeless until Mere arrives alongside the restored Rio, who easily finds Mukoua. While Ken and Gou tend to Kira, the others fight Mukoua. But Mukoua eats the SoZyuTo before enlarging himself. On Rio's suggestion, the gang form Geki RinTohja once again, who battles Mukoua and wins, with SoZyuTo expelled in the explosion. With SoZyuTo back, Rio, Mere, and the Gekirangers return to their time as the Akō Rōshi Raid begins. However, once back, they find the Beast Origin Village in flames.