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!