Naoya Uchida

For a thousand years, the Vikings have made quite a name and reputation for themselves as the strongest families with a thirst for violence. Thorfinn, the son of one of the Vikings' greatest warriors, spends his boyhood in a battlefield enhancing his skills in his adventure to redeem his most-desired revenge after his father was murdered.

Shimazu Toyohisa, while involved at the Battle of Sekigahara, manages to mortally wound Ii Naomasa, but is critically wounded in the process. As he walks from the field wounded and bleeding, Toyohisa finds himself transported to a corridor of doors, where a bespectacled man at a desk waits for him. This man, Murasaki, sends Toyohisa into the nearest door where he wakes up in another world. There, Toyohisa meets other great warriors like him who have been transported as well, to be part of a group known as "Drifters". This world contains both native humans and a number of fantastical races, including elves, dwarves, and hobbits. However, the world is at war, with the humans waging a losing war against another group of great warriors, the "Ends", who wish to take over the world and kill all of the Drifters. Under the Ends' command are many terrible creatures, including dragons, which they use to destroy everything in their wake. At the start of the series, the Ends' army has control of the northern part of the continent, and are currently trying to invade the south through a pivotal fortress at the northernmost tip of a nation called Carneades. Meanwhile, the "Octobrist Organization", a group of human magicians native to this world, attempt to bring together the many individual Drifters to save their world from the brutal Ends.

Itou Kaiji is a bum who steals car emblems and slashes tires on what seems to be a regular basis. This routine changes one day when he is paid a visit by a man in a trench-coat. Once the two get talking, it seems that the visitor (Calling himself Endou) is a debt collector. The reason for his visit is an unpaid loan which kaiji had previously co-signed for a work-mate (Furuhata Takeshi). The original loan was 30000 yen and once Takeshi had disappeared, the loan then fell on Kaiji. Kaiji is then told of a way to clear the interest compounded debt (which stood at 3,850,000 yen), which involved getting on a boat with others in his position. Once on the boat the debtors would then have to gamble with loaned money, which would end with a few winning, and others getting into deeper debt and having to work to pay of their debts. After some coercing kaiji accepts a position on the boat, in order to clear himself and make a bit of money as well...

Scientists believe that 65,000,000 years ago, a meteorite's crash on Earth killed off the dinosaurs, but in truth, it split Earth into two parallel universes: The Earth we know is referred to as "Another-Earth" by the residents of the Earth where dinosaurs were still the superior species, Dino Earth. Overtime, the humanoid Ryujin(dino people) and Bakuryuu(mecha dinos) races came into being on DinoEarth but were at war with the Evolians, enities that emerged from the meteor. The two Earths are separate until Asuka, a Ryujin from DinoEarth, arrives on Earth via a transdimensional portal. However, he is followed by the Evolians in their Anamolicarus spaceship and the three Bakuryuus under their control. As the Bakuryuus Tyrannosaurus, Ptreranodon, and Triceratops attack Tokyo, a call is sent out to people who possess DinoGuts and the potential of gaining the power to tame the rampaging Bakuryuu. Together with their Bakuryuu partners, the three people recognized by the first three Bakuryuu become Abarangers to protect their dimension from the Evolians.