A married couple, Seokbong and Yuna. Hyemin and Jisoo are living together next door. Unlike Seokbong and Yuna, who lead exemplary family lives, Hyemin and Jisoo are a free-spirited couple. However, in fact, Seokbong and Yuna are a sexless couple who cannot open their hearts to each other and are only suffering. One day, Hye-min, who notices Yuna’s loneliness, hits Yuna, and Ji-soo finds out about it, too, and the free-spirited couple decides to help the couple. Seokbong and Yuna couple returned to a harmonious family under their coach. As time passes, the couple comes back to Tae-gi and asks the couple for help.