Library

There is light in life, even if it disappears, it will not be dark With each beep of the electrocardiograph, their stories are restored through the perspectives of Zhou Nan and Xia Xiaozheng, until at the twenty-first beep, Xia Xiaozheng falls asleep forever. Twenty-one, 21, love you Two-line structure, first-line male protagonist's perspective, first-line female protagonist's perspective