Y/N has known Ethan Carter forever—which also means they’ve known his older brother Noah just as long. It was supposed to be simple: stay friends, follow the rules, don’t ruin anything. 1. Don’t fall for him. 2. Don’t let it show. 3. Don’t get caught. But Noah Carter keeps looking at Y/N like the rules don’t apply to him at all—and one summer is all it takes to start breaking every single one.