At night, when Jun Xing was drying his hair in the bathroom, Lin Xi directly opened the bathroom door, and both of them were taken aback. Lin Xi quickly apologized and ran to the kitchen to drink water. Jun Xing hurriedly put on his clothes and walked back to the room. When he passed the kitchen, Lin Xi noticed that he was wearing his clothes backwards. At night, Junxing dreamed that Lin Xi kept talking about being friends with him. He woke up and went to the kitchen to drink water. When he looked in the mirror, he saw someone squatting next to the cabinet. Jun Xing turned around and turned on the light, only to find that it was Lin Xi. Lin Xi explained that she went downstairs to drink water and didn't want to disturb him, so she hid. Jun Xing didn't know how to refute, so he took the ketchup and turned away angrily. The sound of closing the door with force scared Lin Xi. Lin Xi went back to her room, thinking of the troubles Junxing had caused this day, and was very annoyed.
When going out the next day, Lin Xigang got on the back seat of the bicycle, but was reminded by Jun Xing that they need to keep their living together secret. Jun Xing left Lin Xi on his bicycle and told her to take No. 14 bus to school before leaving. As soon as Lin Xi arrived at the school gate, she saw Liu Yin asking Junxing English questions, and Lin Xi looked at them thoughtfully. When Lin Xi returned to the classroom and sat back in her seat, she saw Liu Yin rolling her eyes at her.
During the class, Mr. Sun told everyone that a short play was required in the English public class and handed over the script to Junxing. After class, the few people who recommended themselves read the script and began to assign roles. Seeing that Jun Xing was serving as the white blood cell, Liu Yin wanted to play the role of the red blood cell, but under Lin Xi's suggestion and the voting results of several people, Xie Ang finally served as the red blood cell. After school was over in the evening, other students left the classroom one after another. Liu Yin told Lin Xi that she had to go to the east of the playground for training tonight. Although Lin Xi was suspicious, she still took the script and went to the playground to wait. At home, Aunt Wen came back with supper, only to find that Lin Xi was not at home, and her mobile phone was still left in the room. Amidst Aunt Wen's worried words, Jun Xing rode his bicycle to school.
On the other side, Lin Xi was practicing her lines under a street lamp, but she heard a strange voice, and then she was pulled behind a bush. Qin Kai told Lin Xi that he had just returned to school because he climbed over the wall to surf the Internet, so he was chased by the security guards. The two didn't want to be caught and punished, so they had to run away together. After running for a long time and finally being safe, Qin Kai and Lin Xi made an appointment to see each other next time and bid farewell. Lin Xi walked out of the school gate, just saw Jun Xing, and left with Jun Xing. Jun Xing asked Lin Xi why he didn't come home so late, and Lin Xi hurriedly explained to him. During the conversation between the two, Lin Xi was extremely excited when she heard Jun Xing say exactly the same words as her brother once said.
The next day, Jun Xing saw Lin Xi staring at Liu Yin closely. It turned out that Lin Xi wanted to warn Liu Yin that he was not easy to bully through two pranks. In the corridor, Xie Ang was reciting the lines of the red blood cells, but he couldn't remember them all the time. Under great pressure, he actually tore off the line paper and put it in his mouth. Lin Xi silently watched Xie Ang's behavior from the side. On the day of the English public class, the white blood cell played by Jun Xing and the Streptococcus pneumoniae played by Yimian were inseparable. When the red blood cell played by Xie Ang was supposed to play, he was unable to play because of a stomachache. When the situation was critical, Lin Xi put on the clothes of red blood cells and appeared on the stage, and joined hands with Jun Xing to perfectly complete the short play.
When school was over, Jun Xing asked Lin Xi why he remembered the lines of red blood cells. Lin Xi said that he planned to remind Xie Ang after reciting it, but he didn't expect it to be a great help. Jun Xing thanked her, and Lin Xi took advantage of the opportunity to ask him to buy milk tea. Lin Xi got two glasses of drinks contentedly, but found out that they were sugar-free oolong and pure milk tea. Lin Xi was dissatisfied, but Jun Xing ignored him and pushed the bicycle away. When Lin Xi was about to catch up, she tripped over a stone and accidentally tore off Jun Xing's pants.