Chengzi is annoyed after hearing that Tan Song had walked Tang Wenqi, a girl from the cheerleading team home after he accidentally hit her with a ball. Chengzi overhears a conversation among two girls about how one of them was falling for their best friend. She is angry with Tan Song and tries to avoid him. Having received low marks for Maths, Chengzi's mother signs her up for cram school despite not having enough money to pay the tuition fees. Chengzi is dragged outside by her friend during an hour long break. Her mom sees her at the hair salon and questions her about it. Not listening to Chengzi's explanation, she gets angry and refuses to talk to her. They continue this for three days until her dad explains why her mom behaved this way and why Chengzi should understand her more. They reconcile. Both of her parents suddenly leave for a trip for her aunt's wedding and she is left alone at home. They tell her that they'd arranged for food from their neighbor. Chengzi doesn't eat and instead depends on junk food. Tan Song's grandma asks to check on her and asks him to stay overnight as she was all alone. He is more than pleased with this. Chen Zui, Jinxiao and Jinzhao join in with them. Chengzi falls sick and Tan Song rushes with her to the hospital. Chengzi narrates how many days with him such as this would end up becoming unforgettable days of her past and that she'd remember them for a long time.