Naoko Noda, who works in a trading company, is called “anego” by her younger co-workers. What is “anego”? It means “older sister,” but in this case it is given as a nickname to Naoko because she is like a big sister to her coworkers, who depend on her to give them advice about everything. This drama, based on a popular novel, depicts realistically how Naoko lives her everyday life, including her love life, the problems she faces, and her uneasiness about the future.