It is Tokyo in 1935. 10-year-old Yanagi Etsuko is a young girl who loves songs. Her father Kantaro, a struggling lyricist, still cannot forget her late mother and wastes his life away. Seeing her father like this, Etsuko begins a search for Kantaro’s second bride and the new partner who will be her mother. Her first target is her teacher Muraoka Masako whom she eggs on to land a date with her father. However, it does not go very well. The next person who catches her attention is a salesgirl Ikebe Kyoko whom she met at a department store. Etsuko is drawn to Kyoko’s simplicity and gradually begins to love her as if she were her own mother. However, at that moment, Kantaro’s elder sister Tsuruyo pursues the subject of an arranged introduction with Kusakabe Kaoru, the incredibly beautiful daughter of a bank owner who is a shareholder in her husband’s company. Based on the novel "Ecchan" by Shishi Bunroku.