Falling for someone who tried to kill must be hard :’(

Nah, u gotta say it like this: Falling for someone that will disappear is so hard. Him trying to kill her isn't the issue for her. She is accepting and understanding Doha's situation. So far there are around 50 chaps left that will make it clear for us everything and the reason why Younghwa killed Doha. Also, while helping and being around Doha, Younghwa eventually falls for him even though knowing he will disappear one day and this is truly the hardest part.