The triplets and the five siblings of Songdo have gotten together! Two dads and 8 kids! Even the experienced dads are tired to death! The twins try filming a music video for a children's song. Hwijae tries directing them himself! How will the result look? Sunghoon has become a kindergarten teacher for Sarang. And Sarang's rival appears in Sunghoon's P.E. class! Taewoong and Haejin meets Dr. Oh Eunyeong, the god of childcare. What's the right way to discipline your children?