Geum-ju and Ui-jun end up going on a date at Daecheon Beach. There, they unexpectedly run into Hyeon-ju and Seon-wook, and the four of them end up spending a joyful time together. Hyun-joo and Seon-wook try to keep their romantic relationship a secret, but can they really keep it hidden? Meanwhile, Geum-ju gets promoted at work, and both Gwang-ok and Jung-soo are thrilled to hear the news. However, Gwang-ok starts complaining of fatigue and dizziness...