Fics like an outline of duties

“I’ve been thinking about you. You're very pretty for a Royal Captain, wouldn’t you say?” Smirking, Si-woo grabs a handful of his ass. “Nice and firm back here, too.” Yu-jun stiffens. “Sir? What are you—” Si-woo kneads him, his tone low. “I hear you’re an omega. Is that true, Captain?” “Your Highness, I’m sorry.” Yu-jun’s voice jumps up uncharacteristically. “I don’t understand.” He reels as Si-woo’s wide warm palms massage his ass, a strange heat coiling in his belly. With the recent skirmishes at the border, he hasn’t had time to attend to his baser needs, and his body responds easily to an attractive alpha’s touch. But this is highly inappropriate.