Shiv's Sati Devi
Yes, its a beautiful love story. Everybody knows about Shiv-Parvathi, but Parvathi was once a young and a charm , Sati. Yes, in her previous birth. She was born for Shiv. Shiv was a bachelor in the beginning , so the Gods planned it for him. Sati was born for him. It took some years for Her to realize it though.
Sati was born to the great Daksh Prajapathi, a Vaishnav. Then it all happened some day that Sati had to Depart and return back as Parvathi devi. Its a Sad story...
but with a happy ending..