The Cancer Revelation: In Episode 9, it is revealed that Seok-ryu did not quit her job simply due to stress; three years prior in America, she was diagnosed with Stage 3 stomach cancer, undergoing a partial gastrectomy and intense chemotherapy entirely alone. She hid this from her family to spare them grief, which led to severe depression and her eventual corporate exit.
The Broken Engagement: Her ex-fiancé, Hyeon-jun, arrives in Korea hoping to reconcile. It is revealed that while he cared for her during her cancer treatment, the psychological weight of her illness created an unspoken wedge, leading Seok-ryu to realize he loved her out of duty rather than genuine understanding.
Seung-hyo's Shoulder Injury: Seung-hyo’s dream of becoming an Olympic swimmer ended in high school when he suffered a permanent shoulder injury in a traffic accident—an accident that occurred because he jumped to shield Seok-ryu from an oncoming vehicle.
Kang Dan-ho's Family Truth: Dan-ho is not little Yeon-du's biological father; he is her uncle who adopted her after his brother and sister-in-law died in a tragic car accident, dedicating his life to her upbringing.
The Series Finale Resolution: Seung-hyo proposes to Seok-ryu with a ring. However, Seok-ryu gently requests to postpone their wedding for thirty years (eventually settling on a short delay), wanting to fully focus on her new healthy restaurant, Rainbow Kitchen, and enjoy being dating partners first. Seung-hyo buys and renovates her father's closing snack shop into her dream restaurant. Mo-eum accepts a dream 1-year paramedic post at the South Pole, with Dan-ho and Yeon-du promising to wait for her. The series ends warmly with Seung-hyo and Seok-ryu bickering playfully while strolling down their neighborhood alleyways, completely in love.