Yukiaki Kiyama

Yokohama, 1963. Japan is picking itself up from the devastation of World War II and preparing to host the 1964 Olympics—and the mood is one of both optimism and conflict as the young generation struggles to throw off the shackles of a troubled past. Against this backdrop of hope and change, a friendship begins to blossom between high school students Umi and Shun—but a buried secret from their past emerges to cast a shadow on the future and pull them apart.

After the end of the civil war that tore apart Japan, the new governors of Touto, Hokuto and Seito work together to reunify the country. However, they are actually members of an extraterrestrial race called the "Blood Tribe" (the same species as Evolto), who assumed their government positions as part of a plan to destroy Earth as they have done to Mars and other planets before. Considering Sento Kiryū (Kamen Rider Build) a major threat to their plans, the Blood Tribe manipulates his friends and other civilians into attacking him. With even his close ally Ryūga Banjō (Kamen Rider Cross-Z) now against him, Sento must fight to survive and stop the Blood Tribe's plan from succeeding.

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.

Kamen Riders Build and Ex-Aid team up with the legendary heroes of the Heisei Generation - OOO, Fourze, Gaim, and Ghost.

Takeshi Hongo is a promising young man with a passion for motorcycle racing. However, his dreams are suddenly ruined when he gets kidnapped by Shocker, the evil secret organization planning to dominate the world. After being remodeled into a cyborg, Takeshi escapes and swears to protect the world from the inhuman monsters.