Here we go:
Kaori Miyazono had died, her ghost had faded into petals after the final performance, she thought that would be it, she had fulfilled her purpose which was to play with Kōusei Arima, however fate would have it, she wasn't truly gone yet.
She would enter the supposed afterlife where she saw a Piano and a violin and before she could head to it, she as stopped
"You know, your not finished just yet" said a random voice
"Wait what" said Kaori
Kaori turned around to see a figure,
"Thanks to Amercian scientists and their genetic producing, you will be returned to the world" said the figure
"But I'm dead, I died on the operating table" said Kaori
"Your correct, but not long after you died, The Amercians dug you up, transported your body to California and then converted back to baby form and now you'll be returned in that body, you will be adopted by a new family and you will live a new life" said The Figure
"So I may never see my friends, my old family and my Kōusei Arima again" said Kaori
"by the time you've reached your teens, they will be in their adulthood, so it would be highly unlikely you'll meet them until their 30s when a event happens, a war" said the Figure
"What war" said Kaori
"Thats for you to find out" said the Figure
The figure then disappeared and Kaori saw a flash and then suddenly her memories went and then she was reborn as a baby
"A new life has been created" said a doctor
Then a doctor stormed in a room and took this baby into a ward then a man with a brown moustache and slick brown hair came in with a woman with blonde hair and glasses.
"Mr and Miss Collins, congratulations this is your new baby girl" said the doctor
Miss Collins took hold of the baby girl and said "Mike, what shall we name her"
"Lucy, let's name her a more English version of her original name, how about Kerry and for her middle name will be her old surname Miyazono and of course Collins will be the last name" said Mike
"Ok, Kerry Miyazono Collins, I like it" said Lucy
And with this a new era had begun
