Yuno has long dreamed of attending Yamabuki Arts High School, and when she receives her acceptance letter she faces the daunting prospect of leaving home and family for the first time. At Hidamari (Sunshine) Apartments she discovers that her neighbors, though not related, are all fellow art students who quickly become her new support network. Second‑year students Hiro and Sae try to act as helpful older sisters, with varying success, while Miyako, her energetic new neighbor, classmate, and best friend, has the most intimidating apartment in the building. Together they help Yuno navigate the quirky personalities around her, including an oddly masculine landlady.