Kamen Rider Zangetsu the Stage -Gaim Gaiden-(2019)

Kamen Rider Zangetsu the Stage: Gaim Gaiden is a Japanese tokusatsu film following Takatora Kureshima's return to an abandoned Yggdrasill Corporation site in the war-torn Republic of Torukia after eight years. A sudden attack sends him tumbling into a hidden underground city where young men battle for survival using Lock Seeds and Drivers to transform into Armored Riders. Stripped of his memory by the fall, Takatora finds shelter with Team Orange Ride's leader. But the city harbors a darker secret: hidden cameras monitor every conflict, orchestrated by unseen forces. Among them lurks a man bent on revenge against Takatora for reasons yet unknown. As danger closes in, Takatora must navigate the city's lethal landscape and uncover the truth behind the conspiracy threatening them all.