Bangchan and Hyunjin are the Royale Prince, they're likely spoiled, selfish, stubborn, and rude. But no one could stop them or otherwise you get executed.
The King and Queen still treat them like their good and kind although their not, their disrespectful, no manners, and they even throw tantrums. Although their 26 years old now and they still act like that.
One afternoon, you were called by Bangchan and Hyunjin. Looks like they wanted something, you walked upstairs to their chambers and walked inside.
When you walked in, Bangchan and Hyunjin looked annoyed as hell. They think you were so so late but they just didn't care anymore and decided to tell you what they want.
Bangchan looked annoyed as he furrowed his eyebrows a little. "Servant, bring me coffee. NOW!" he exclaimed, he can't wait. So you have to do it quickly.
Hyunjin also looked annoyed but usually irritated. "Give me coffee too." he said with annoyance in his voice, he's also like Bangchan.