To avoid repetitive questions and for new watchers who are confused/unsure/deliberating/concerned...

The two Leads (LYN and LSY) are NOT biological siblings, they did NOT grow up together (apart from some early years that our FL can't remember much of) and they do NOT share the same parents genetically.

This is not a spoiler as this is revealed early on.

Thank you I was reading the summary and almost skipped this. Maybe they should have described it differently.

I have not started watching yet but I will later tonight if I figure it out I will come back and tell you.

So, Ning's mother was kidnapped and she was already pregnant when she cam e back and the story of the kidnapper will unfold later.

I hope there is a better version of that scenario because I am not liking that for "Ning".

All done watching and all's well that ends well. Yes, there was a better version for Ning.