Sunhee is proud to be the older sister, but she soon discovers that being the "best" older sister takes more than just being older. When her younger brother makes mistakes, needs help, or wants to tag along, Sunhee must learn how to be patient, kind, and responsible. Guided by her parents and shaped by her own growing sense of empathy, Sunhee begins to understand the value of her role within the family. Set in a Korean American household, this tender story gently explores the joys and challenges of sibling relationships while celebrating cultural family values.