In the early morning, the sun shines into the classroom of Chunhui Middle School, and there is a bouquet of flowers on the desk. Lin Xi, who was wearing a wedding dress, picked up the flowers, turned around and saw Jiang Yimian hanging a banner saying "Three years of hard work, a lifetime of happiness" on the blackboard. Still doubting that the bridegroom hadn't arrived, Lin Xi found out that Ji Junxing and his best men were walking in through the door after Yimian's gesture. At this moment, they were spotted by security, and they ran away holding hands.
Eight years ago, Lin Xi, who was still a high school student, took a photo of Junxing and saw Ji Junxing locking his car. Lin Xi couldn't help but stepped forward and hugged Jun Xing. Jun Xing quickly pushed Lin Xi away, saying that he didn't know her. In the classroom of Class One, Senior Two, Teacher Sun introduced Lin Xi, a new transfer student. When arranging the seats, the teacher saw that there were no other vacancies for the time being, so he asked Lin Xi to sit with Jun Xing. After class, Jun Xing took Lin Xi to collect school uniforms and textbooks. The class bell rang, and the two hurried to the classroom, but they were still late.
Back in the classroom, after the two finished answering the questions on the blackboard, Director Xie asked them to stand outside the door and reflect. Suddenly, Lin Xi couldn't stand and fell, not only pulling Jun Xing down, but also tearing his clothes crookedly. Lin Xi quickly apologized, Jun Xing hoped that Lin Xi would stop harassing him. Lin Xi didn't want to give up being friends with Jun Xing, so she asked Jun Xing to put forward conditions, and if she couldn't do it, she wouldn't bother him anymore. Jun Xing took advantage of the situation and put forward three conditions, hoping that Lin Xi would retreat despite the difficulties.
During the break between classes, Jun Xing and his friend Xie Ang heard the exclamation of other students. After a closer look, it turned out that it was Lin Xi who was flying up with a balloon tied to a leaf downstairs. Lin Xi told Junxing that he had met the first requirement. Then Lin Xi took Junxing to the sports equipment room and turned off the lights. When Junxing opened his eyes again, he saw crystals in the bottle shining like stars in the dark. Jun Xing reluctantly agrees to the completion of the second requirement.
In the third class in the afternoon, in order to welcome the leaders, the school organizes a general cleaning of the whole school. Lin Xi came to the corridor and asked Junxing if he could change the third condition. On the other side, Yimian was reading extracurricular books, Xie Ang reminded her to take out the trash, and exposed her lies, Yimian was so angry that she chased Xie Ang with a broom. Downstairs, Director Xie was introducing to the leaders the school's excellent quality education for students. In the corridor, Lin Xi was about to help Junxing hang up banners, when Xie Ang who ran over slipped and bumped into the two of them. The banner fell downstairs, and it happened to fall on Director Xie's head, and Director Xie accidentally dropped his wig when he removed the banner.
Back in the classroom, Director Xie reprimanded the students for the banner incident. Jun Xing and Lin Xi stood up one after another to admit their mistakes. Director Xie asked them to stand in the corridor holding a banner and go to the radio room to read the self-criticism after school. Although Lin Xi was punished, she felt very happy that she could become friends with Junxing after fulfilling the three requirements. When Jun Xing learned of the rumors on campus, he angrily announced on the radio that he had nothing to do with Lin Xi. Lin Xi was very disappointed when she heard it, but she still expressed her apology for the trouble Jun Xing had caused and the many things she wanted to do with him in the future.
In the evening, Jun Xing came home by bicycle, but when he opened the door, he found that Lin Xi was actually at his home. During dinner, Aunt Wen, Junxing's mother, kindly asked Lin Xi how she was adapting to school, and asked Lin Xi to live here with peace of mind this semester. Jun Xing pulled his mother to the side to ask, Lin Xi listened to the words of the two, and recalled the conversation between his mother and father when he was at home. Back in the room, Lin Xi hurriedly took out the little fox doll and the little book from her bag to see Aunt Wen who came to deliver the fruit, put the little fox on the table, and wrote down her daily life in the notebook. Feel and say something to your brother.