The protagonist, Ruoruo, is a college graduate who has just started working. Because of the repeated stimulation from his first love, Yu Tao, and the youthful playfulness, he finally suffered complete "amnesia" under the stimulation of Yu Tao's current girlfriend. The youth life with current boyfriend Yinan, best friend Cangyan and a series of characters. Ruoruo, who has "amnesia", remembers nothing and lives the life she should live. But he disappeared for a period of time before his wedding to Yinan, and told Yinan the truth. His "amnesia" was fake. It was because he couldn't get over the obstacles and couldn't stand the stimulation, so he pretended not to remember, hear, and see. But he disappeared because he was ashamed of Yinan. But Yinan's love for Ruoruo went beyond that, and she only asked, "Are you willing to live with me forever?"
After getting Ruoruo's affirmative answer, Yinan said, "Youth should be unscrupulous. Just have me in your youth." In the end, Ruoruo and Yinan were finally together. Yu Tao was relieved and lived his own happy life. Cang Yan and Ouyang couldn't be together because of Ouyang's car accident. Zhu Tou and Shen Xiaohui were really happy to give Ruoruo a son who called her "uncle". Apple's son cried at Ruoruo's wedding and said, "Mom, I don't want a brother."