Not my Story , Based on Movie "Millionaire's First Love"

Ten years ago two best friends were saperated and they made a promise that one day they will be together again....

It was Raining
"Minnie don't cry , I will be back. I'll be back to you after ten nights. no matter what i will come back for you I promise" a ten year old boy said as the tears rolled down his milky white cheeks.
"Promise me ...that you will come back" a nine year old girl demanded as the tears were flowing from her  eyes too.
Both of them made pinky promise and the boy hugged her and left with his uncle.

Ten Years Later. . .
Shin Min Hee a beautiful girl standing at the roof top of her school in rain looked towards the buildings and then people walking down on streets. She looked at her hand and raised pinky then she made a fist and got it on top of her chest and closed her eyes. 

Lee Luhan a handsome and rotten 19 year old high-schooler usually known as "Richie Rich or Millionaire" due to all the wealth his parents left for him after their death. The only heir of the family with all the bad habbits. 
Something Happened with Luhan eight years ago but no one knows. 

She is still waiting for him , where as he have forgotten everything from past and have started a new life...Will Fate get these two together again....??