Witnessing Tae-gwang drag Eun-bi onto the bus, Yi-an chases the bus until he can no longer catch up. Tae-gwang turns to Eun-bi and asks if he can be the one person who calls her by her real name. She looks back at him, speechless and wide-eyed.
At school, Song-joo announces to the class that the bully from Tongyeong isn't So-young. They're mistaken: The bully was from a neighboring school, and So-young transferred because of her father's work placement. The truth about So-young's despicable past remains hidden for now.
Yi-an walks into class and stares at Eun-bi's desk then Tae-gwang's - both empty. He's clearly bothered by their absence together.
Sitting on a park bench, Eun-bi asks Tae-gwang what her real name is, challenging him to call her by it. His silence prompts her to leave, but he answers, "It's Go Eun-byul. Your name is Go Eun-byul, so start acting like her. I don't know why, but I hate seeing you shrink in front of Kang So-young."
Eun-bi tells Tae-gwang to stay out of her business, but he scolds her saying that she should be more responsible for herself. He reveals that So-young is starting a background check with her handwriting. Words are not enough anymore. She needs to embody her rejection that she's not Lee Eun-bi, and Tae-gwang offers to help her.
Tae-gwang returns to school without Eun-bi, and Yi-an glares at him accusingly. Teacher Kim ends class with the results from the latest math exam, and students rush to the front to check their scores. Min-joon is surprised to find that he's in second place, half a point under So-young's perfect score. The students comment on So-young's proficiency, and Min-joon feigns indifference.
Eun-bi surprises Mom by showing up at her shop. She tells Mom that she hasn't been feeling well, so she left school. Then she hugs her, saying that she'll feel better this way. Their sweet moment is interrupted by Soo-in's mother, who greets Eun-bi (as Eun-byul, of course) in a deliberately friendly manner. Mom quickly sends Eun-bi on her way, and she does as told, sensing the eeriness of their interaction.
Yi-an starts to leave class but turns back around to wake Tae-gwang, unable to subdue his frustrations. He asks where he went instead of coming to class, and Tae-gwang wonders aloud if Yi-an is worried about him. Yi-an replies to him in a roundabout way, "Yes, I'm very worried, so behave."
Looking at Yi-an's medal, Eun-bi thinks back to their argument, as does Yi-an after practice. She waits outside her house, hoping that Yi-an will show up as always. Yi-an passes by much later and looks up to Eun-bi's dark room. He waits in his usual spot outside the fence while Eun-bi waits outside Yi-an's practice pool.
The next morning, Eun-bi looks for Yi-an to join her routine morning bike ride. She smiles when she spots him jogging towards her, but he jogs past her without a glance. With eyes full of disappointment, she trails behind him.
Yi-an continues to ignore Eun-bi, and when her bike chain falls off, she calls out to him for help. She cries that her bike chain fell off, but her plea holds more implications: "I can't go to you, so can't you come to me?"
Responding to her plea for help, Yi-an runs to Eun-bi and scolds her for crying over her broken bike. He ruffles her hair, and Eun-bi smiles back at him, relieved that their unfriendly tension is over. Yi-an reminds her that she can tell him anything. Though she appreciates his earnest support, she knows better than to tell him everything.
As Eun-bi gets ready for school, she looks at her nametag that labels her as Go Eun-byul. Thinking back to her turbulent time being bullied as Eun-bi and the support she now gets - from Tae-gwang and Yi-an - as Eun-byul, she resolves that she'll fully play her part. She goes to school with a new look resembling Eun-byul's style. Tae-gwang notices the change when she walks in, and they give each other knowing smiles.
