Season 1 Key Twists & Developments: Ahn Jeong-won secretly runs the 'Daddy-Long-Legs' charity fund for needy patients using his inherited wealth. Though set on becoming a Catholic priest, his growing feelings for resident Jang Gyeo-ul and his passion for pediatric surgery lead him to stay at Yulje, culminating in a romantic kiss in the Season 1 finale. Ik-jun’s absent wife requests a divorce early on, leaving him as a single father to U-ju; before heading to a conference in Spain, Ik-jun confesses his feelings to Song-hwa. Jun-wan secretly dates Ik-jun’s sister, Ik-sun, before she leaves for studies in the UK. Seok-hyeong inherits his late unfaithful father's fortune but refuses to run the corporate business, staying an OB/GYN doctor.
Season 2 Key Twists & Finale Resolutions: Song-hwa initially hesitates following Ik-jun’s confession to protect their 20-year friendship, but after Ik-jun suffers a head injury from a mugging incident, she realizes her feelings and confesses to him during a heavy rainstorm in Episode 11. Jeong-won supports Gyeo-ul through her family trauma, and they plan a one-year sabbatical together in the US to study pediatric surgery. Seok-hyeong overcomes his hesitation and overbearing mother to date resident Chu Min-ha. Jun-wan and Ik-sun resolve past misunderstandings and reunite. In the series finale, the five friends gather for one last sunset band practice, content in their careers, friendships, and romantic lives.