Dark Emperor Knight: Starting with Kamen Rider Geats

Baicang is a devoted Kamen Rider fan, but he unexpectedly discovers that his world doesn't exist in reality. It's a world on a photographic negative. Worse still, on the Day of Oma, his world will be destroyed by Oma Zi-O (not the Kamen Rider Zi-O version).

Already exhausted and despairing, he unexpectedly receives a special gift. With its power, he sets out to restart the path of the Dark Decade, gathering the powers of every Kamen Rider in an attempt to resist the coming Great Calamity... But when he finally takes up that power, he discovers that he won't be following a fixed order of worlds. His destinations are completely random... And his supposed first stop turns out to be Kamen Rider Geats?