Some time ago, the influential and powerful Toue Inc. bought the island of Midorijima, Japan, with the plans of building Platinum Jail—a luxurious utopian facility. Those who are lucky enough to call it home are the wealthiest citizens in the world. The original residents of the island, however, were forced to relocate to the Old Residential District; and after the completion of Platinum Jail, they were completely abandoned. "Rib" and "Rhyme" are the most common games played on the island. Rib is an old school game in which gangs engage in turf wars against each other, while Rhyme is a technologically advanced game wherein participants fight in a virtual reality. To be able to play Rhyme, you must have an "All-Mate" (an AI that typically looks like a pet), and the match must be mediated by an "Usui." Aoba Seragaki has no interest in playing either game; he prefers to live a peaceful life with his grandmother and All-Mate, Ren. However, after getting forcefully dragged into a dangerous Rhyme match and hearing rumors about disappearing Rib players, all of Aoba's hopes of living a normal life are completely abolished.

Early Reins features six beautiful women on a train en route to Sunshine Hill in the early 1800s. When the train is highjacked by robbers and the soldiers on board are caught unawares, another surprise is in store: these lovely ladies can fight! The heroine emerges as Margarette, a young woman determined to become a sheriff although she is somewhat lacking in experience. She gains plenty on this trip, however, and the ragtag team of Western warriors joins forces with another passenger, Spencer, to fight some nefarious bandits and guide the train to safety.

Once upon a time, an unidentified enemy, the Unknown, suddenly appeared. The "Super Evolutionary Railway Development Agency," had developed the "Shinkalion," a robot that transforms into a bullet train, as a countermeasure against this threat.

If there's one word to describe Reiji Ozora, it would be "quitter." He can never find the motivation to finish anything, and loses interest at the drop of a hat. This all changes when his best friend Maiko introduces him to the new game "Dragon Drive." In this virtual reality game, each player is assigned a dragon tailored to match their personality and strength. Reiji hopes for a big, strong, scary beast, but instead, he is stuck with Chibi, a cute, friendly-looking dragon smaller than he is. How disappointing—except it turns out that Chibi is the rarest dragon of them all! Reiji finally discovers something he can remain interested in, and works hard to train both himself and his newfound friend. Soon this training will be put to use to save the world, for there are people who have dark aspirations for Dragon Drive!