I Belonged to Your World – Judy Qi, Liu Yitong, Jerron Wu

In 2021, Qi Yue, who always ranked last, and the top student Lu Xiao had an intersection due to a "campus fire case". When Qi Yue was punished by the school principal to run laps, she was hit by Xu Zhaoyang's flying ball, and she developed a crush on the handsome Xu Zhaoyang.

In 2051, Qi Shuo activated the time machine button and went back 30 years to find Qi Yue. Qi Yue mistook Qi Shuo for a bad guy who was following her and knocked him down. Qi Shuo explained that he was Qi Yue's future son. Qi Yue suspected that the man in front of her had been beaten silly by herself. To prove his identity, Qi Shuo and Qi Yue underwent DNA testing, and the results showed that there was a "99.99%" probability that they were mother and son.

Qi Yue woke up early and found that Qi Shuo had brought her favorite breakfast. He said that he had traveled through time to save Qi Yue, and the first step was to help her pursue her future husband, Lu Xiao. Qi Shuo found Lu Xiao and deliberately used physics, which was Lu Xiao's favorite topic, to start a conversation. After gaining Lu Xiao's favor, Qi Shuo successfully got Lu Xiao and Qi Yue to exchange WeChat contacts.

Qi Yue and her father Qi Haonian attended a family gathering. Qi Haonian forgot that his daughter was allergic to peanuts, and Qi Yue ate all the peanuts in her bowl in anger. Qi Shuo noticed that Qi Yue was anxious after finding out about her allergy, and Qi Yue felt warmth in her heart.

In the evening, Qi Yue saw that the academic overachiever Lu Xiao had climbed over the wall, so she followed him closely.

Because Qi Yue and Lu Xiao had an accident outside of school, Qi Shuo rushed to the hospital anxiously and found Qi Yue, as well as the young Deng Shuling - the aunt who had taken care of him since he was young. Qi Yue went to ask Qi Haonian to attend her parent-teacher conference, but Qi Haonian showed indifference towards her, causing Qi Yue to angrily leave. Lu Xiao noticed Qi Yue's sadness and took her away, even treating her to a hot bowl of instant noodles.

The next day at the parent-teacher conference, Qi Shuo suddenly appeared as Qi Yue's cousin to attend the conference. Qi Yue felt warmth from her family for the first time and finally accepted this unfamiliar son from the bottom of her heart. Qi Yue told Qi Shuo that she was willing to pursue Lu Xiao, but only on the condition that it was okay with Qi Shuo.

On New Year's Eve, Qi Yue returned to Qi Shuo's side alone and spent the Spring Festival with her son. At the same time, she also prepared a gift and went to Lu Xiao's home to give it to him.

Under the supervision of Qi Shuo, Qi Yue's grades improved significantly, but the principal suspected that she had achieved these high scores through plagiarism. In the end, Lu Xiao stepped forward, found evidence privately, and cleared Qi Yue's name.

Qi Shuo asked Qi Yue to invite Lu Xiao to dinner, and Qi Shuo cooked while Qi Yue made a gesture of gratitude. After completing the task, Qi Shuo quietly slipped out of the house to create a world for the two of them.

With the college entrance examination looming, Qi Yue focused all her thoughts on studying. Her hard work paid off, and she was admitted to Qingnan University with a passing score. As a student representative at the graduation ceremony, she was asked to give a speech because of her transformation from a poor student to a successful one. On that day, Lu Xiao also went on stage as an outstanding graduate. When they stepped down, Qi Yue almost fell, but Lu Xiao caught her from behind.

On the first day of college, Qi Shuo asked Qi Yue to agree to three rules: study hard, pursue love diligently, and stay away from senior students. He also said that he would conduct surprise inspections from time to time. Lu Xiao happened to be on the way and walked with Qi Yue to the school gate. However, as the new school grass, Lu Xiao's handsome appearance immediately attracted the attention of his classmates, while Qi Yue was taken away by her overly familiar roommate Xie Jiajia. Qi Yue and Xie Jiajia bumped into the school flower Liang Yufei downstairs in the dormitory building, and Xie Jiajia almost spilled fertilizer on Liang Yufei's shoes.

Xu Zhaoyang invited Qi Yue to his birthday party. Qi Yue carefully prepared a gift for Xu Zhaoyang, but she soon found the same gift in a second-hand store on campus. Qi Yue discovered Xu Zhaoyang's selfishness and was disappointed in herself for misjudging people.

Qi Yue discovered that Liang Yufei was Lu Xiao's childhood sweetheart. So, Qi Shuo launched a new plan and used his professional knowledge to obtain the position of teaching assistant in the laboratory of Qing University. This way, he could occasionally mention Qi Yue in Lu Xiao's ear and prevent Liang Yufei from making advances toward Lu Xiao.

Xu Zhaoyang noticed that Qi Yue always paired up with Lu Xiao, so he teamed up with Liang Yufei to try to drive Lu Xiao away from Qi Yue. He explained to Qi Yue one by one about the previous "misunderstanding": it was their roommate who stole the birthday gift Qi Yue gave and sold it to a second-hand store. Meanwhile, on his way to meet Qi Yue, Lu Xiao met Liang Yufei.

Liang Yufei stopped Lu Xiao and wanted to take this opportunity to confess her love, but Lu Xiao seemed completely absent-minded and only said that he had other important things to do before leaving. Qi Yue was unhappy when she found out that Lu Xiao was late, but Xu Zhaoyang appeared in time to comfort her. In their interaction, her prejudice against him seemed to be slowly disappearing, and the scene of Xu Zhaoyang happily chatting with Qi Yue happened to be seen by the belated Lu Xiao.

Qi Shuo heard rumors that Xu Zhaoyang planned to publicly confess his love to Qi Yue today. When he arrived at the auditorium, he found that the confession ceremony had already ended. Qi Shuo asked the cleaning lady and learned that the girl had agreed to the confession. Qi Shuo angrily found Xu Zhaoyang and the two got into a fight.

After returning home, the injured Qi Shuo had a big fight with Qi Yue and stormed out. Qi Shuo went to Deng Shuling's house to stay, but Qi Yue suddenly came to Deng Shuling's house to vent her frustrations. Qi Shuo had to hide and learned through their conversation that the confession ceremony at the auditorium was just a misunderstanding and that Qi Yue had already rejected Xu Zhaoyang.

Qi Yue told Lu Xiao about Qi Shuo's disappearance, and Lu Xiao decided to help Qi Yue find Qi Shuo.

Due to the disappearance of Qi Shuo, Qi Yue and Lu Xiao's feelings gradually warmed up during the process of searching for Qi Shuo. Qi Shuo then transformed into Deng Shuling's boyfriend, helping her fend off all unreasonable demands for overtime and work, which made Deng Shuling, who had always been single, feel the warmth of being loved for the first time.

One day, Deng Shuling suddenly received a call from Qi Yue. Qi Shuo was eavesdropping nearby and decided to create a further intimate world for the two of them after hearing that Qi Yue and Lu Xiao had been together all along. When Qi Yue discovered that Qi Shuo's location was in a suburban area, Lu Xiao rented a car and headed there. As it was already late, the two had to stay at a resort. Strangely, except for one large bedroom, all the rooms in the resort were booked by an anonymous guest, so the two had to share a room.

One day, Qi Yue suddenly visited Deng Shuling's house but didn't mention anything about looking for Qi Shuo. Qi Yue mentioned that someone had been following her recently, which made Qi Shuo, who was hiding in the dark, very worried. After Qi Yue left, Qi Shuo hurriedly caught up with her and found a strange man following her.

It turned out that Qi Yue and Lu Xiao had used a trick to lure him out, and the mother and son officially reconciled. Deng Shuling realized that Qi Shuo had changed towards her in recent days, and she began to think of him whenever she did anything.

In order to get closer to Lu Xiao, Qi Yue joined the drama club selection. Qi Yue and Lu Xiao both joined the club. Xu Zhaoyang challenged Lu Xiao to a match on the court. On the court, Lu Xiao was handsome and brave, but Xu Zhaoyang frequently played dirty and injured Lu Xiao. Lu Xiao lost the game, but he also won Qi Yue's heart.