Seoeon and Seojun just love toys. So Hwijae has prepared a special event! It's to spend the time on an island where there are no toys! Donggook takes his twin girls and Daebak to a counseling center to figure out their personalities. To test Daebak's problem-solving ability, he's told to take out the banana inside multiple boxes. SoDa Siblings try farm-staying according to Bumsoo's philosophy. They visit a traditional market in Chungju to prepare crops for farming. Everything seems so new and interesting to the city kids. The joint- parenting project! Jiho, Dongkeun and Gyojin have come together! How do they react at their first encounter?