Republic of Torchia began to decline with increasing poverty and dispute. In the past it was the Research Lab for Yggdrasill Corporation's Project Ark. Takatora Kureshima (Kamen Rider Zangetsu) who had finished his role of protecting the city gets to know that something strange is happening over there. He decides to step his foot in Republic of Torchia after 8 years. Because of an attack, he falls into the giant hole to the underground world called Underground City.
Gaku Matsuda who had played Zack / Kamen Rider Knuckle in Kamen Rider Gaim Series had appeared on Kamen Radiranger 163 aired on November 13. Tomomi Jiena Sumi (Gaim / Radiranger Sakura Pink) had appeared as assistant.
OP - JUST LIVE MORE / Gaim no Kaze (OP of Kamen Rider Gaim)
ED - TEAM BARON / Dance with Me (ED of Gaim Gaiden: Kamen Rider Duke / Kamen Rider Knuckle)
TEAM BARON / Dance with Me (Short version) (Theme Song of Gaim Gaiden: Kamen Rider Duke / Kamen Rider Knuckle)
KAMEN RIDER THE DINER are going to introduce a new Collaboration from November 1. This collaboration is with Gaim Gaiden: Kamen Rider Duke / Kamen Rider Knuckle.
The New Poster of Gaim Gaiden: Kamen Rider Duke / Kamen Rider Knuckle reveals the new song of TEAM BARON. This song is titled as "Dance With Me". It is going to be the Insert Song of Gaim Gaiden. The release information is still not known.
It is not known whether this Gaim Gaiden will have a Ending Song or not.