The Understanding Program

Just after Maryella said "goodbye" to her teenage daughter (who only answered by a cruel silence) at her highschool, the mother drived to a near labo to join other parents as they will begin an experimental Program.
A man explained to Maryella and the others they will now join their new body and new identity as higschool students. One month earlier, they have been chosed because they lived some hard times with their teenage child. The Understanding Program offered them to live a teenager life. Field agents will be with them to be sure everything went well. They will be paid for it as it was a first experience for the company who hoped to commercialize the program if it is successful.

The explanation over, Maryella went to a lab where she saw a red-haired 17YO girl sleeping. An employee told her it will be her new body. Indeed, five minutes later, Maryella was in complete control of the body she chosed to call simply Mary.

"Ok "big sis" ! Ready for your first day at your new school ?"

Maryella looked at the girl looking like her but slightly younger. She was a 28YO female employee who will play her 14 YO little sister, Nina, to watch her every day during the program.

"I... I'm ready ! Let's go, "little sis""