21-Year-old Lin Xiaoxiao met 19-year-old Zhou Xubai during the summer vacation of her junior year. One was a senior from Southern University and the other was a junior who had just finished the college entrance examination in the north. They met on the companion platform, from the tacit cooperation in the audio hall to the unexpected start of sister-brother love, from staying together in a distance of 1,200 kilometers apart to knowing each other and falling in love in reality. This relationship has experienced the questioning of the age gap, the test of family changes, and the crisis of third party intervention. When the sister's rationality meets the brother's persistence, when the passion of youth meets the cruelty of reality, they spent five years writing a sibling love story about growth, protection and relief.
