Sunghoon and Sarang have so much fun in Osaka, Sarang spends her birthday at her grandparents' house and experiences various things she had never done before. Meanwhile, Tablo and Haru go to the aquarium to see fish, which are Haru's favorite thing in the world. Hwijae, worried about the twin's eyes, takes them to an eye doctor. They get their eyes checked up and Hwijae gets so scared by the sound of their crying. Also he takes them to a baseball park with him. Hyunsung goes to Junu's parent-teacher conference and gets surprised by Junu's letter and his performance in school.