Shimazu Toyohisa is the real-life samurai who fought in the pivotal Battle of Sekigahara. In his dying moments, Shimazu is transported to a world of magic with other famous warriors throughout history. These warriors are forced to fight each other in an endless battle.
While fighting an intense inter-galactic war, a mecha pilot was accidentally warped into a space-time neither he nor the computer of his mecha could recognize. After waking up from a long-time hibernation, he found himself trapped on a planet, with human residents talking in an unknown form of language, using inferior technologies, and -- most shocking to him -- naturally breathable air.
Touya Mochizuki was accidentally killed, and as an apology, God allows him to be reborn in a fantasy world and will grant him any one wish he desires. And so, Touya chooses to keep his smartphone in the next world. In his second chance at life, he befriends many important figures and comes across the world's secret. He inherits the legacy of an ancient civilization and travels around nonchalantly while possessing powers that rival this world's kings.
Shinichi Kanou is a young secluded Otaku who is offered a job thanks to his vast knowledge of anime, video games and manga and just after meeting his new employer, he is kidnapped, awakening in an alternate world with a fantasy setup. Shinichi then is informed that he was in fact selected by the Japanese government to help improve his country's relations with this new world by establishing a company to spread the unique products of the Japanese culture to this new, unexplored market.
Gene Starwind and his partner Jim Hawking run a small business on the backwater planet of Sentinel III. But all that changes the day that Hilda hires them for a bodyguard job. Now, thrust into a mystery they don't fully understand, they're on the run from the cops, the pirates, an angry alien, and a mysterious assassin. But they've got one thing going in their favor—they have the galaxy's most advanced ship, the Outlaw Star.
In another dimension the Devil King Sadao is only one step away from conquering the world when he is beaten by Hero Emilia and forced to drift to the other world: modern-day Tokyo. As "conquering the world" are the only skills the Devil King possesses - and are obviously unnecessary in his new situation - he must work as a freeter to pay for his living expenses.