Character Arc
Oh Yi-young is the emotional anchor of Resident Playbook, a first-year obstetrics and gynecology resident who comes to the specialty after an earlier stretch of her career fails to take hold. She arrives at Jongno Yulje Medical Center with a mix of determination and self-doubt, older in spirit than some of her peers yet just as raw when faced with the relentless pace of the OB-GYN ward. Her restart gives the series its central question of whether it is ever too late to find the work, and the people, that fit.
Across the season Yi-young grows from a hesitant newcomer who second-guesses her instincts into a resident who learns to trust her training and lean on her colleagues. She absorbs hard lessons from difficult deliveries and long overnight calls, weathers the scrutiny of senior physicians, and gradually discovers a steadiness she did not know she had. Her warmth and willingness to show up for others make her a natural center of gravity for the first-year cohort.
Yi-young's bonds with her fellow residents, including her sharp-edged peer Pyo Nam-kyung, drive much of the show's heart. As the four newcomers move from strangers to something like family, Yi-young's arc traces the quiet accumulation of competence and confidence, treating growth not as a single triumphant moment but as the slow, cumulative result of showing up day after day. Specific plot details should be verified against official sources, as the series is a recent release.