Midori Makibao is a small white racehorse. Compared to other thoroughbred horses, he looks more like a donkey with wide nostrils. However, with his guts and speed as his weapon, Makibao wins in every big race.<br><br> In the beginning of his career, Makibao had a trouble making his debut as a racehorse, because of his appearance and various disadvantages he had. But Makibao had reasons to overcome his difficulties; there was a lifelong rival horse called Superhorse Cascade, that Makibao needed to defeat. Plus, he was determined to win back his mother, a horse that had been taken away for pay back the debt on the farm.<br><br> There are many hardships that Makibao has to overcome, but he thrives in the series of races to become a great racehorse.<br><br> (Source: Pierrot)