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5 years ago, Asuna informs Kuroto that they have found doctors who have discovered the Bugster virus, namely Taiga, still a radiologist, and his partner Maki. The two doctors are then taken to CR to undergo a series of tests, with one of them being a VR simulation. Taiga enters the simulation and is given the Gashacon Magnum, while a few Bugster Viruses appear before him. Taiga displays exceptional proficiency with the Magnum, and Kuroto, impressed with the results, chooses Taiga to become Kamen Rider Snipe…

After Maki injures himself trying to transform, Taiga underwent the compatibility surgery and trains as Snipe. However, Taiga pushes himself to his limits using the Proto Gashat and winds up in the hospital himself, unable to help his patient, a young woman named Saki…

The third of four episodes of a special Blu-Ray miniseries of Kamen Rider Ex-Aid.

The fourth and final episode of a special Blu-Ray miniseries of Kamen Rider Ex-Aid.