Before the Storm (폭풍 전야, Pokpung Jeonya) is chapter 20 of the Twelve Nights webtoon.
Jeok finds Nabi alone and suggests that she give up, if she thinks that things are becoming difficult. She says that she will continue, since they have already gone far. From a distance, Won witnesses Nabi and Jeok together and angrily walks out instead of giving Nabi her medicine.
In her quarters, Hyun Bin recalls her wager with the king: if her child is a boy, she shall be Won's bride for the wedding. Otherwise, if the child is a girl, she shall give him one-third of the Seo Seo land she inherited.
The next day at the marketplace, Won plays the street game with luck and recalls the sight of Nabi with Jeok. However, Nabi comes to him, asserting that it really is his "lucky day".