As a sole witness of the theft, Yubin secretly finds it amusing when Yerim, the most popular girl, loses her laptop. Yubin approaches Gayoung, the culprit, and volunteers to help her out.
Suyeon comes back to her hometown to find the sound that disappeared. She meets Kyungmin, whom she has not seen in a long time, and they realize that their memories are different when they share their stories.
Upon arriving in Seoul for college entrance exam prep classes, Seoyun decides to visit her older sister, who had long severed contact with her family. At her sister’s apartment, Seoyun is greeted by her sister’s lover.
