main character Lukas(16)(the story is told from his perspective) girlfriend Karyn(16) mother Sahra(36) brother Mark (5) sisters Kimmy(8),Lea (14)and Nicole (6) Lukas is standing in a store where he finds a stone and buys it he meets his girlfriend Karyn Karyn:"hello Lukas what kind of stone is that?" Lukas:"hello Karyn just a normal stone the seller said that you can change reality with wishes and only people who heard the wish remember the old reality and wishes can not be undone (if you become younger you can not wish to be your previous age again you have to live until you are that old again and if you change your gender you stay like that forever) and you can not swap bodies and also the memories of everyone else change so that they think it was always like that and you can not wish that someone who hears it forgets the stone and that the personality changes also not if you hear it but that is probably just nonsense" Karyn looks at him Karyn: what if you wish that I am a cheerleader then we will find out" Lukas:"ok I wish that Karyn is a cheerleader"suddenly her clothes change to cheerleader clothes and she gets a call from a cheerleader the stone works.
(sorry from my bad english)