Fourth Wing - Rebecca Yarros

The Empyrean Series: #1
Violet Sorrengail was supposed to live a quiet life among books—but instead, she’s forced into the brutal world of dragon riders, where survival isn’t guaranteed and weakness is quickly eliminated. Surrounded by fierce competition and deadly challenges, she must rely on her wit, resilience, and unexpected allies to make it through.
As danger intensifies and loyalties are tested, Violet finds herself drawn to a powerful, morally grey rider who may be just as dangerous as the world around them.
A gripping, high-stakes fantasy filled with dragons, slow-burn tension, and a romance that builds in the middle of chaos and survival.
 
Tropes:
Fantasy Romance
Academy Setting
Slow Burn
Morally Grey Hero
Enemies to Lovers