It was supposed to be a simple first day of work for Toeis newest finance employee Sasaki Motoharu until he suddenly found himself in the Warring States Era. About to be killed in the battlefield, he is saved by none other than the man who later becomes the respected Toyotomi Hideyoshi but at a cost to the latter's life. While trying to figure out what to do next, he suddenly crosses paths with Oda Nobunaga who is now a brilliant but young girl named Oda Nobuna.
Upon seeing her in trouble, he goes in to help and along the way, discovers that the sample Sengoku Driver and Blood Orange Lockseed he had with him for a marketing exercise have become real, allowing him to transform into Bujin Gaim. He also discovers that the sample Legend Rider Lockseeds that had been with him are now missing. Now he works under Nobunas command as "Saru" with his new goals being to bring back history to its correct course, locate and secure the scattered Legend Rider Lockseeds and find his way back home to the present world.
This fanfic provides examples of...
- Action Girl: Carried over from the Light Novel source material.
- Ascended Extra: The other Bujin Riders when compared to their original source material.
- On the Nobuna side, there's Bontenmaru and Tsuchimikado. In the anime, the former had limited screen time and the latter was fully cut. Here, Bontenmaru has an interest in Motoharu, giving her more incentive to show up in events while Tsuchimikado takes on a more antagonistic role, partnering up with Danjou.
- Ascended Fanboy: A bit of a strange case. Motoharu used to be a fan but stopped watching after Kamen Rider Blade to focus on studying to get into a good high school and university and eventually land a good job.
- Badass Baritone: Transforming into Bujin Gaim also makes Motoharu sound like Rikiya Koyama, who actually did supply the voice of Bujin Gaim in the movie.
- Badass Biker: Once Motoharu manages to get his hands on a Dandeliner.
- Borrowed Catchphrase: Shows up once in a while depending on which Rider Lockseed Motoharu briefly uses.
- Cameo: Narutaki, Beast Chimera and the Woman of the Beginning through possession of Himiko
- Christmas Cake: Katakura Kojuurou feels that she will become this... at the age of fifteen.
- Clingy Jealous Girl: Nobuna doesn't take it well when she hears that Motoharu is engaged to Bontenmaru.
- Cool Old Guy: Saitou Dousan.
- First Kiss: Motoharu gets his from Bontenmaru of all ladies
- Fish out of Temporal Water: Motoharu had some difficulties adjusting to the era.
- Great Detective: Bujin Double. He is actually able to deduce that Nagamasas a female through observation.
- Henshin Hero: Motoharu as Bujin Gaim.
- Idiosyncratic Episode Naming: Chapters are called "Slices".
- Large Ham: Bontenmaru. Motoharu can slip into this when he uses the Beast or the Fourze Lockseed.
- Make My Monster Grow: Done to a Lion Inves in the Fourteenth Slice.
- Ninja: Goemon and Hattori Hanzo. Motoharu gains ninja like abilities through Jimber Matsubokkuri Arms
- Wild Card: Bujin Decade is identified as one by Bujin Kiva.
- Willfully Weak: This is the case with Bujin Faiz. He does have access to Blaster form but using it would put a severe drain on his masters spiritual energy.