Ryokan Koyanagi

The time is UC 1926. The Imperial Army's 203rd Air Mage Battalion led by Major Tanya Degurechaff has won the battle to the south against the Republic's stragglers. They expected to be given a vacation after returning victorious, but instead receive special orders from Staff HQ as soon as they get home. They are told that there were signs of a large-scale deployment near the Empire-Federation border. Faced with the prospect of a new major enemy, the desperate Empire fans the flame of war. Meanwhile, an international volunteer army spearheaded by the Commonwealth set foot in Federation territory. As they say, the enemy of an enemy is your friend. They suffer through misfortune purely out of national interest, and among them is a young girl. She is Warrant Officer Mary Sue, and she takes up arms hoping to bring the Empire, who killed her father, to justice.

Kamen Rider 4 is a web series which was released as an accompanying special to the film Super Hero Taisen GP: Kamen Rider 3. It introduced a new rider, Kamen Rider 4, who is the fourth Kamen Rider cyborg created by Shocker after Kamen Riders 1, 2, and 3. The plot goes around a time loop created by the Shocker that resets whenever someone dies, but whenever the loop resets Shocker itself somehow grows stronger and stronger. Thus, it is up to the Riders to decide whether to keep on fighting a useless battle... Or end the loops for good by sacrificing one of their own.

Kamen Rider Drive Special Event: The Special Circumstances Case Investigation File is the first stage show of Kamen Rider Drive. It was performed live on May 3-4, 2015, and was released on DVD on September 9, 2015. This event included a special show featuring Kamen Rider 3 and Kamen Rider 4 with lights, sounds, and special effects along with a completely original story.