S1·E13 A Drop Of Doubt

So-ra gives Youn-kyum clues about Ra-el's identity. Ra-el and Youn-kyum's relationship becomes compromised with So-ra's drop of doubt. Realizing there isn't much time left, Ra-el thinks only of her revenge. Youn-kyum senses Ra-el's secret, but it doesn't cloud his love for her. And Ra-el has a hard time taming her heart for his unconditional love.