Peter and Lara Jean's first date in the movie includes them making wishes on lanterns before they let them free in the sky. At the end of the movie, Lara Jean talks about her wishes and how this is the beginning of her story with Peter. In the book, however, there's no lantern scene, but there are still wishes. Instead, the entire second half of the book involves the group of teens playing a game of Assassins, in which the winner is granted a wish of their choice. Lara Jean wins and in the heat of her anger at Peter, she wishes they could go back to the way things were before they got together. In the end, though, she tells him she wishes for things to stay happy with them.