Hitori Gotoh, a shy, awkward, and lonely high school student dreams of being in a band despite her doubts and worries, but when she is recruited to be the guitarist of a group looking to make it big, she realises her dream may be able to be fulfilled and come true.

In a world very much like our own, great race horses of the past have a chance to be reborn as "horse girls"—girls with the ears and tails of horses as well as their speed and endurance. The best of these horse girls go to train at Tokyo's Tracen Academy, hopefully moving on to fame and fortune as both racers and idols. Special Week, a high school horse girl from the countryside, has just transferred to Tracen, and she's determined to fulfill her promise to her mother to become the best horse girl in Japan. On her way to school, she takes a pit stop at the race track and instantly falls in love with Silence Suzuka's style, becoming determined to race on the same team as her.

Another dimension that continues to taint our world, the Shadow World. Humanity is faced with the worst calamity, known as the Shadow Labyrinth. In spite of their desperate attacks, Desir Herrman and his friends lose their battle to the Destruction Dragon, Boromir Napolitan, and the world comes to an end. When Desir is convinced of his end, he opens his eyes... to find himself 13 years in the past. Desir has gone back in time to the enrollment ceremony of Hebrion Academy, the top school for mages in the Empire. To change the future of impending doom, Desir reassembles his friends once again to save the world!