Kamen Rider Zangetsu the Stage Gaim Gaiden

Takatora Kureshima Kamen Rider Zangetsu visits a former Yggdrasill Corporation experimental project site located in the poverty and conflict stricken Republic of Torukia He is visiting the site for the first time in 8 years and is suddenly attacked Suprised he stumble and falls into a giant hole which leads into an underground city This underground city is the most dangerous place in the republic in which many young men are killed defending themselves while trying to survive These men use Lock Seeds and Drivers to transform into Armored Riders Due to the fall Takatora has lost his memory He is helped by the leader of Team Orange Ride Unbeknownst to them there are cameras hidden all around the underground city The ones behind the cameras are responsible for the conflicts in the city One man in particular is seeking revenge on Takatora for a specific reason