For your prompt question: A prince getting embarrassed and humiliated and feeling worthless, and their knight praising them till they believe what they're saying
Or, the opposite, where the prince is the model of perfection, and the knight takes them apart and degrades them and says that they're the only one who knows what the prince really wants
Prince bites the inside of his cheek and keeps his eyes trained on his hands that are folded on the table. His father's voice ... no, the king's voice is heard through the entire hall, spitting words of humiliation in his direction.
Because prince is worthless.
Because he is not like his perfect brothers.
He tastes blood on his tongue once he is allowed to leave, walking into his room, ignoring the footsteps that are following him. Knight hasn't left his side, despite the king ordering him to. But knight said he only listens to prince, who has no ambitions to tell the other to leave him alone. He is too busy thinking.
Prince looks up from his hands, snapping out of it. He doesn't remember getting into his room, but he doesn't care. The closed and locked door helps him to relax again. At least a little bit. With his clenched jaw, prince looks up at knight who kneels in front of him, reaching out his hand for prince to take it.
Knight kisses the hand softly, stroking a thumb over the soft skin. When he looks up, their eyes meet and he reaches out his hand, placing his thumb on prince's lips, touching them ever so slightly. He gets up, facing the other - faces only inches apart.
"To me, you are perfect, your highness," he mutters and closes their distance again to place his lips on prince's.
"To me, you are worth more than any person in this palace. Any person in this land." His fingers trace his arms up and down, lips moving down towards the other's neck. He can see prince shudder under his touch and smiles to himself.
"Let me show you, how serious I am about this," he continues and starts stripping prince out of his garments, taking his time to cherish the moment, button for button, lace for lace. The two of them are in their undergarments moments later, prince lying on his back. Knight takes his time to kiss and touch every inch of the other's body, muttering sweet nothings until he starts praising him.
"Not only your body is perfect, your highness. Your sharp mind and tongue are the reason I fell for you so fast," he breathes and licks the sensitive skin on the other's neck. His nose takes in his scent, making his head spin. "Do you believe me?"
He looks down at prince, eyes only half-open and filled with lust. A nod indicates his answer, but knight doesn't want to stop just yet.
"Your strong will ... compassion. Oh, and that little sound you just made," knight continues with a little chuckle and softly bites prince's ear. "The way you come undone beneath me when we share a bed ..." His fingers make their way under the undergarments after tracing the shaky thighs, now almost touching the wetness greeting him.
"You are perfect to me, your highness. I won't let you forget that. Not this night nor any other night. My prince, allow me to take your thoughts away."