Overview: Song Ilkook has the usual tough time playing with the triplets in the park. Sarang gets to meet some special people, a legendary baseball player and the prince of Asia, Jang Keunsuk. The twins celebrate their 500th day by going to Namsan. Haru go to cheer on her mom filming on set and gets jealous at the actor playing Hyejeong's daughter. And we say goodbye for the time being to Yeonu.