Book one of the series of IN TIME: Invulnerable.

Kristina attends her practice in school. With a glimpse, she saw Nicole. In a couple of minutes, Kristina was shocked that Bruce was listening at them. What is she going to do? One time, their teacher requested Bruce and Kristina to buy something for the whole classroom. When they're on the ground floor already, the say someone. Out the school, they already bought the things until a boy arrived and said something terrible that Kristina didn't like. So Bruce and Kristina fought. Will they go back?