Hi I am looking for a romance drama

Hi! A friend looks for a kdrama about two girls, one rich and one poor. The rich one had a boyfriend but she also had another lover and when the boyfriend catches the other two together, he leaves. The rich girl goes after him and she hits the poor girl with the car. Then the rich girl dies and her parents replace their daughter with the poor girl. That is what she remembers, maybe you can help us, please!

P.S. I took a look back at episode 1 of  Nakark Kaew and this is literally exactly what happens in this drama. FL is cheating on ML. ML sees and drives off. FL goes after him but gets into a car accident and hits a girl. 

The rich girl doesn't die but is in a coma and may not wake up so her evil scheming mother has a plastic surgeon do surgery on the poor girl to make her look like her daughter. The poor girl has amnesia from the accident so she believes the scheming mother that she is her daughter. 

 PeggySue:

It may possibly be Mask ? I know there is a car accident involved and changed identity in this one... 

However, it actually sounds VERY much like this Thai drama I LOVE: Nakark Kaew

Hi,  it was Nakark Kaew. Thank you very much to you all! ;D