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.
武田航平
as Kazumi Sawatari / Kamen Rider Grease
Michael Tomioka
as Simon Marcus / Phantom Crusher
趙珉和
as Keiji Uraga
高田夏帆
as Misora
犬飼貴丈
as Sento Kiryu / Kamen Rider Build
赤楚衛二
as Ryuga Banjou / Kamen Rider Cross-Z
滝裕可里
as Sawa Takigawa
水上剣星
as Gentoku Himuro / Kamen Rider Rogue
越智友己
as Nariaki Utsumi / Kamen Rider MadRogue
木山廉彬
as Takumi Katsuragi
山田明郷
as Taizan Himuro
栄信
as Akaba
