Nara Mariano became the side character of the story she loves to read, Tallie Sage Castillo. Nara got in a car accident and when she opened her eyes that she is in someone's body. She realizes that she is in the book she read and the title is "Breathing in two worlds." Her goal was to be a friend of the main characters. Before she died, she wished to have a group of friends like the friendship of the characters. She never had a real friend, and that's why she envies the main character, Marisole Sevilla. Marisole Sevilla is the Female Lead of the story "Breathing in two worlds." She lived in two worlds. The one is in the real world, and the other is where the male leads and her best friend exist. But, Tallie didn't expect to have feelings for one of the Male leads who will be with the female lead's best friend. Will she leave happily ever after, like Marisole at the end of the story?