Uma Musume: The Demon King of Good and Evil

Everyone at Tracen knows that Spica has a little Uma Musume who is in the same year as Tokai Teio but has never raced. Every day, she's either sleeping or on her way to sleep. But after some of the Spica members leave, she finally steps onto the track for the first time. What will happen next? (Follows the anime's main story. Pairing undecided for now.)