Kangin & Yoonji move into another apartment, Yuhki Kuramoto makes a guest appearance and performs for Yoonji's belated birthday. Junjin and Si Young engage in a psychological battle as they are given the mission "Smile no matter what to prove you can be a harmonious couple". Sung Rok becomes a guest for Shinyoung's radio live show. Later, Shinyoung watches Sung Rok's musical theatre. Hyungdon and Taeyeon go bungee jumping but Hyung Don refused to do it because of acrophobia.