Ilkook and the triplets participate in "Box 1 Race!" They make a boat with boxes themselves and row along Hangang! Sarang and Sunghoon visit the twins' house! But suddenly a fierce chase happens? What has happened to Sarang and the twins? Jion and Taewoong have a photo shoot. It was very tough but how are the results? On the day of Donggook's soccer match, the five siblings visit their dad with the sign they made themselves! Guest stars: Guest narrator - Yoona from Girls' Generation (Source: Wikipedia)