Under The Burning Crown

It's a realistic-fantasy forbidden romance where the princess and her knight are already secretly in love. Like... sneaking into each other's rooms, stolen kisses in empty hallways, whispered "meet me after everyone's asleep" kind of love.
But here's the catch:
She's forced into an arranged marriage for the good of the kingdom - and he's sworn to protect her, even if it means protecting her while she marries someone else.
There are secret make-out scenes, heartbreaking almost-goodbyes, holding each other like it's the last time... and the constant fear that if anyone finds out, he'll be executed.
It's messy. It's emotional. It's doomed.
And neither of them knows if love is enough to survive it.