21 years ago, a baby arrived on earth inside of a peach. Today, five warriors based on the legend of Momotaro fight enemies that are inhabiting humans, invisible to the naked eye. Together they fight to take back gears based on previous Super Sentai.

Without an official spy organisation, Japan is seen as a hotbed for crime by foreign and domestic criminal groups. K13 is a unit established within the Tokyo Metropolitan Police Department to combat this situation. The activities of K13 are known only to a few people and its members do not exist on record. Led by the top agent code named Mirage, K13 members target not only brutal crimes but are also given secret missions to handle crimes which cannot be solved politically and socially. Meanwhile, there are people who intend to set up a police organisation like the FBI in the US and strengthen the Japanese police by enacting a bill to expand its powers. Before long, the K13 gets embroiled too and a huge conspiracy is revealed.

Momo (Rika Adachi) hopes to become a video game designer. She has applied for numerous jobs in that field, but has failed every time. Finally, Momo is hired as an apprentice to a game programmer. While accumulating experience, Momo, with her strong will and love for games, grows up.

Joe Yabuki is a troubled youth, whose only solution to problems is throwing punches at them. What he lacks in manners and discipline, he makes up for with his self-taught fighting skills. One day, while wandering the slums of Doya, Joe gets into a fight with the local gang. Although greatly outnumbered, he effortlessly defeats them, drawing the attention of Danpei Tange—a former boxing coach turned alcoholic. Seeing his potential, he offers to train Joe into Japan's greatest boxer. At first, Joe dismisses Danpei as a hopeless drunk; but after the trainer saves his life, he agrees to live with him and learn the art of boxing. Unfortunately, Joe's personality makes him an unruly student, and he often falls back to his old ways. To survive the harsh world of his new career, Joe needs to trust his mentor and master the techniques taught to him. However, the road to becoming a professional boxer is rife with struggles that will test his mettle to the end.