Episode 5 of Absolute Value of Romance begins with the teachers having breakfast before school. Dong-ju chats with Woo-su about Eui-ju and claims that he was being very strict with her. They discuss the after-school program and the fact that Woo-su finally gets his glasses back. Da-ju and Gi-jeon ask Woo-su to thank the person who returned his glasses to him after all the trouble it caused him.
On her way to school, Eui-ju reads the comments on her story. Go-ya asks to read the story too, but makes a harsh comment about the BL genre. Eui-ju feels conscious about the novel and lies to Go-ya about it. Meanwhile, Eui-ju reluctantly hands her application to Woo-su. Gi-jeon, who is struggling to get enough students for the PE class, tries to argue with Woo-su over Eui-ju, but concedes when he learns that she is failing in Math and needs serious help with the subject.
At PE class, Go-ya tells Eui-ju that she would like to propose to Dong-ju once she turns 20. She claims that she likes him because he is pitiful, which makes him endearing. At the closing assembly, Woo-su reminds Eui-ju about the after-school class as well as the cleaning duty. Jennie invites Eui-ju, Go-ya, and a few other girls from class over to her house for a sleepover.
After school, Eui-ju helps Gi-jeon clean out the basketball court and talks to him about his back injury. Eui-ju gets upset that Woo-su is keeping her from attending Gi-jeon’s extra classes. Just then, Woo-su calls her, and Eui-ju is forced to rush to the Math extra class.
Eui-ju learns that she is the only student in the class with the lowest grades and decides to leave. However, Woo-su finds her outside and drags her back to class. In class, Eui-ju notices that Ha-su has a crush on Woo-su. With nothing to do, she falls asleep and dreams about the next chapter of her novel. Woo-su gets upset with her for sleeping and gives her homework.
After the class, Eui-ju heads to Jennie’s house for the sleepover party. She asks Jennie to join her so they can roast potatoes together. There, Eui-ju politely brings up Jennie’s Brazilian boyfriend and claims that she has also read the web novel, "A Night in Paris," that Jennie used for her fake boyfriend story.
Jennie tells Eui-ju that she has never had a boyfriend and that she learned Korean from reading these web novels. The two girls bond over their love for reading, but Eui-ju keeps the fact that she reads and writes BL stories a secret.
That starlit night, as the five girls gazed up at the celestial wonders above, Eui-ju's mind was suddenly jolted by the realization of her uncompleted math homework. With a reluctance to engage in the task, she decided to forgo it and braved the next day's school trip without any assignment.
Upon arriving at the staff room, Eui-ju disclosed to Woo-su her incomplete homework. Woo-su reprimanded her for not even attempting the problems, her disappointment evident in every word. Eui-ju couldn't fathom why Woo-su was reacting so intensely to her homework.
Later in the evening, as she settled into the library to pen a new, particularly vivid chapter in her novel, Eui-ju was taken aback to find Woo-su standing behind her. The episode concluded with Woo-su reading the chapter that Eui-ju had just penned.
