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. (Source: Official Website, translated)

Second part of Shadowverse Flame.

In the year 2000, Alice Hayashi wins a trip to the moon in a sweepstake. However, when her shuttle launches, something goes terribly wrong, and the next thing she knows, she has crashed somewhere in a frozen wasteland. Before she can get her bearings, strange soldiers begin to attack her, forcing her to flee. Eventually, Alice meets a young man called Yuan, who tells her that she is in Lapland in the year 2030. The soldiers pursuing her belong to Nero, an enigmatic leader who controls the world through his supercomputer. He is also responsible for reducing the Earth's population by over seven billion. Convinced that Nero has something to do with her time jump, Alice, Yuan, and the android maid Maria journey to Kingdom, the shadowy fortress that Nero rules from.

The Iron League: a place where teams of robots, under individual owners, play various sports and duke it out in tournaments. Mach Windy is a member of Dark Prince, a team that doesn't play fair and fights dirty to win. Unsatisfied with the actions of his teammates, he defects against the will of Dark Prince's nefarious owner and joins Silver Prince: the weakest team in the league. Alongside faithful companions such as Magnum Ace and Bull Armor, Mach Windy and Silver Prince will battle against Dark Prince in games of soccer and baseball, and aim for the top! (Source: Animeplanet)