The episode begins with Kitty nervously taking her Korean Literature exam in class, her future hanging in the balance as the results will determine if she graduates. Meanwhile, Yuri presents Kitty with a photo of their mothers and Professor Lee on a roller coaster at Lotte World, sparking a conversation about recreating the photo. Kitty decides to use it as leverage to convince Professor Lee to take the senior class on a field trip there.
Elsewhere, Marius congratulates Q for breaking Jin’s hurdle race record, causing tension between the couple. Yuri is upset about her low-paying internship with Yisoo, but Juliana encourages her to keep going. Eunice announces that her debut single is charting at number 10, much to Min Ho’s excitement.
Min Ho receives a message from Mr. Moon about recording a new album with Eunice, and he realizes he may not be able to go to NYU as planned. He asks Kitty about her future plans, and she admits to being unsure but considering staying in Seoul. The two decide to take things one day at a time.
The students head to Lotte World, where Eunice secures VIP entry for the group after being recognized. Meanwhile, Alex convinces Jiwon to dress in a school uniform to recreate a popular couple trend at the park.
Kitty and Yuri reach the rollercoaster from the photo, but Kitty panics when she sees its size. Min Ho tries to calm her by taking her to a photo booth, where they take pictures together and spend some quality time alone.
The group splits up across the park, and Yuri and Juliana talk about Praveena’s absence. Juliana starts to notice Yuri getting closer to her. Yuri struggles to enjoy the park now that she has less money and has to wait in lines. Dae offers to act as her concierge for free, trying to show her that things can still be enjoyable.
Meanwhile, Q and Jin channel their frustration into their games, as they reconcile and confess their love, culminating in a passionate kiss that Marius observes from afar. Min Ho, accompanied by Kitty, ventures into the horror room, further exacerbating her anxiety. As the group gathers near the roller coaster, a Korea Dispatch article about Eunice and Min Ho ignites speculation about their relationship, leaving Kitty uneasy.
Concurrently, exam results are released, and Kitty refuses to check her score, opting to step away from the crowd. She confesses to Min Ho that she's not ready and decides to take a walk, where she encounters Marius, who is visibly upset about Q and Jin's reconciliation. Kitty listens to Marius's concerns and realizes they share similar feelings. She admits her fear of leaving her friends behind upon graduation. In that moment, Kitty decides not to let her grades define her and finally checks her result, discovering that she has passed.
Kitty and Marius reconcile, putting their differences aside. She reunites with the group, shares her result with Min Ho, and joins her friends on the roller coaster. After the ride, Eunice feels nauseous, and paparazzi capture photos of her in that moment. She tries to escape the photographers' attention while Mihee enlists Jiwon and Alex's help to drive them away.
On the bus ride back, Marius apologizes to Q and admits that his return to KISS was influenced by him. Meanwhile, Yuri discusses Dae's goal of getting into SNU and notices that he seems unhappy despite his good grades. She encourages him to reconsider what he truly desires.
That night, Min Ho cancels his date with Kitty after Eunice asks for a private meeting. From her dorm room window, Kitty witnesses Min Ho hugging Eunice and feels hurt. The episode concludes with Eunice informing Min Ho that she is pregnant.
