Sip of Poison

From Lezhin:
A slave can never go against their master. Every slave knows that, so Baek-ha’s resigned herself to her fate as a lowly servant. She’s determined to keep her head low to survive, and it looks like she’ll be able to spend her days trapped in the all-too familiar, safe cycle of labor. That is, until the day her master brings an unexpected guest into the house. Baek-ha instantly knows that this man is dangerous his eyes are full of an unfamiliar madness. There’s a poison in his gaze, and Baek-ha must do everything to make sure she doesn’t get addicted to it.