Cant remember K-Drama name...

EDIT: The Drama is Cinderella and the Four Knights! Also this original post may have some spoilers if you haven't watched it yet.

Original Post:

Can someone please help me.

I saw a Drama a while ago and I am trying to remember the name, 

It's a drama about a lady who is a taekwondo teacher, her mom was also a taekwondo teacher and she dies in a fire accident trying to save her future boyfriend dad, the mom gave her a necklace that matches her boyfriend necklace before she died in the fire.

This is all I can remember.... If you know the name of  the drama I am talking about let me know please.

Thanks, but no, it's not that one.

In this drama the taekwondo is not the focus, she just happens to teach in instead of her normal job. Also it's a romantic drama, this stuff happens more to the half/end of the drama. When it is reveled that the couple share this childhood event.

I am currently watching Suspicious Partner, that is why I remembered that other Drama, because the plot of couple parents in a fire accident together was familiar.

By the way I remembered what Drama it was.

It's Cinderella and the Four Knights!!