Deputy Officer of the United Nations Alliance, Simon Marcus, who aims to conquer the world with the terrorist organization Downfall along with the mad scientist Keiji Uraga, attack the Kamen Riders with overwhelming strength. It is only on Kamen Rider Grease that the enemy's abilities did not work. In order to defeat this new enemy and rescue Misora, Kazumi Sawatari must create a new item ... but it is told that it requires the life of his friends, the Three Crows. The ultimate decision must be made.
Kouhei Takeda
Kazumi Sawatari / Kamen Rider Grease
Michael Tomioka
Simon Marcus / Phantom Crusher
Tamiyasu Cho
Keiji Uraga
Kaho Takada
Misora
Atsuhiro Inukai
Sento Kiryu / Kamen Rider Build
Eiji Akaso
Ryuga Banjou / Kamen Rider Cross-Z
Yukari Taki
Sawa Takigawa
Kensei Mikami
Gentoku Himuro / Kamen Rider Rogue
