Fire Wakes Water is a 94,000 word historical fantasy novel set in a world based on 7th Century Japan and is not about samurai.
your hook starts here:
Ayame, the daughter of a simple farmer, is shocked when one of the Emperor's wizards arrives to take her to the magical school by force because she possesses the Gift.
Known as the "magical prison," the school is on a remote island where all children born with the Gift are taken. They lose their names, their past, and their pride as they are trained to be ruthless wizards loyal only to the Emperor.
Her Gift turns out to be more of a curse in a school where failure means death. An older male student named Kentaro falls in love with Ayame and they try to escape the island but are thwarted by a magical barrier.
When Master Otakayama, the school's tyrannical headmaster, becomes interested in Ayame's elemental magic, she has no idea that he intends to use her magic to awaken an ancient dragon. She grows more powerful under his tutelage, but fears for her life when she learns that none of the female students live long enough to graduate.
So, what's her dilemma? Kill the Otakayam dude and run off to Tokyo to become a harajuka girl? You're giving us back story and world building. Focus on what happens to Ayame when she realizes all is not well, and what she has to do to survive.