All the families are gathered in Jeju-do and they have a blast at the twins' 1st birthday party. The next day, each family goes on their own adventure. Haru's family goes horse riding and eats a unique type of seafood instant noodles. The Jang brothers go hang gliding and swimming. Sarang's family go to pick dekopon and go in search of a dol hareubang. The twins enjoy a date at the soccer stadium and later visits their dad's friend Heo Su-gyeong's home, where Seoeon shows his Casanova personality when he chases Su-gyeong's, 7 year old daughter Byeol around her house. (Source: Wikipedia)