Feral Guardian by Ember Holt — book slip

Lily, a princess known for her rebellious nature, is sent to a royal academy to refine her magic and manners. Upon completion, she is expected to return home to secure a powerful husband to rule alongside her.

However, Lily desires freedom over a kingdom and finds solace in adventures with her bodyguard, Alastair.

Alastair, an honor-bound knight tied to a prophecy, suppresses his desires, believing that if Lily doesn't ascend to the throne, the kingdom's peace will collapse.

Their journey home is disrupted when Lily is captured by pirates, prompting Alastair to confront his feelings and the prophecy that binds them.

For fans of Rebecca Yarros, Carissa Broadbent, and Sarah J Maas.