The Prince by Mell Eight

Captured as a prisoner of war, Prince Clament expects rough treatment. However, the extent of torment he endures is beyond even his expectations. When Prince Braxton frees him, Clament knows it’s only a farce meant to coerce him into finally spilling all his country’s secrets. Except, despite all his efforts—magical and common—Clament finds himself helplessly drawn to Braxton, wishing he could believe the tantalizing promises Braxton makes.

Unfortunately, the war continues to be fought. When the ongoing battle spills into Clament’s healing ward, resisting Braxton takes a backseat to simple survival. And yet, Clament knows he must make a terrible decision: believe in Braxton and betray his country, or betray Braxton and possibly get him killed. That is, assuming Clament is allowed to live long enough first.