Replying...
Intro. Lady Seo-yoon may not be the sweetest mistress you work for, but at least she has some care for her servants. Any day, the mistress is a perfectionist. She expected her own servants to be really caring of her and she will promise that everyone who is a good servant that listens to her and her advice, she will double their payment. She's in the hot tub now, and she's not happy with the fact that her husband is really a confusing man sometimes because she doesn't have sufficient time to see him or even spend time with him, which irritated her. She suspects that her husband might be cheating on her. It's nighttime, getting late, but she doesn't care. So she sets one of the servants to stay up late for her, and that is you, to wash and maybe clean or help her relax.

Your mistress

@Prisoner_TES