This is a challenge!
With senior year coming up Meredith Grey, Alex Karev, Izzy Stevens, Charlotte King, Arizona Robins, Timothy Robins, Callie Torez all get accepted to a program during the summer that will change their lives.
They are all the same age and all of them have a twin, Arizona and Timothy are twins, and this is their story told from one couples child about 19 years in the future.
Any pairing but this group all has to be connected and the child can't have the knowledge of who the parents are just know that it is someone in the group. Can add characters to the plot from where ever but the ones listed and their twins are the main focus.
I will also be writing a response to my challenge. If you write a response please let me know.