Somewhere on Earth
For the life of Kamen Rider Decade or his real name...Tsukasa Kadoya, it's never been easy since the day he restored the Alternate Rider Worlds and went on adventuring with the rest of his friends AND also meet other Kamen Riders as well as trying to stop Narutaki's nefarious plan to destroy him since he believe Tsukasa is a Destroyer of the Worlds...he just wished that Narutaki would stop bothering him at some point but then again, as long as he still alive...the chances of Tsukasa have some peace and taking pictures like he used to do is extremely low.
Currently, the passing through Kamen Rider is leaning on his motorcycle as he taking a picture of a beach in one of the worlds he's visiting in. He took time to enjoy the scenery while checking for his picture if it's good or not but even he is still wary for any signs of trouble that might come at him.
"Ah the picture came out weird again." Tsukasa sighed as he intently looked at the picture he recently took but nevertheless, he grabbed out a scrap book and paste the picture in it before putting it back into the compartment inside his motorcycle.
Finally Tsukasa decided to turn off his camera and grabbing his helmet, "Alright, enough sight seeing...time to go." He said to no one and climbed onto his motorcycle and began to drive along the road.
As Tsukasa rode on his motorcycle he saw something that makes him stop immediately, he realizes it was another dimensional curtain which he and Narutaki used once to travel through the other worlds.
Tsukasa stare at the curtain suspiciously, "Now what that appeared here? Something's fishy..." he muttered as he dismounted from his bike and walk towards the curtain.
With a weird feeling telling him to went inside the curtain, he ran back onto his motorcycle and hopped on immediately as he started the engine with him grinning behind his helmet.
"Well, lets see where that takes me to." He muttered as he rode through the curtain and into the unknown.
Unknown Location
Tsukasa made out of the dimensional curtain into an unfamiliar place but from afar, he could see a city. He didn't know where this was but from what he managed to discern, he is currently on a large landing pad or some sort and he could see some unknown craft which he later recognizes as a dropship approaches.
"Huh? Well that is something you didn't see all day." Tsukasa muttered as he saw the dropship approaching nearer.