Hwijae has been struggling daily with the unruly twins, and he decides to tame the twins by turning himself into a doll. The twins also get to meet a new friend, Nayul. Soeul and Daeul visit their farm in Chungju where they planted apple mango trees with their dad. To celebrate the twin sisters' birthday, Sian and Donggook prepare a surprise birthday party, as well as their long-awaited gift.