Unicorn Academy - Honorary Siblings

Princess Talulah of Eqeoneian, a kingdom separated from the rest of the world, loves to ride. Not getting much attention from her parents or her brothers, Talulah finds company with the steeds that reside in the royal stable. But when she gets an invitation to a mysterious riding school, Talulah disregards the possible dangers and runs away to her new life. Unaware of the panic she's caused by leaving, Talulah realizes the riding academy she was invited to is actually a school that teaches students to become unicorn riders, and to protect Unicorn Island. Still shocked by this revelation, Talulah tries to fit in at Unicorn Academy. Rory, the biggest prankster in the school, decides that Talulah needs help loosening up, and takes her under his wing as his protege in fun. Although confused, Talulah follows Rory and the rest of the gang around as she gets used to her new life and tries to hide her true identity. But when someone very close to her in her home is in danger, Talulah realizes her family might just be the unicorn riders beside her.

(By the way, I'd like to specify that this story takes places after season one. But since I'm not sure if or when Unicorn Academy gets a second season, everything in this book happens before season two. If season two happens, I'll write the events where they fit into the book.)