Trying to become an admirable person, Maruko reads biographies and attempts to imitate great people—but everything she does is half-hearted and short-lived, and every time, everyone laughs at her. Yet she keeps thinking that one day she’ll write a song… and the song she finally creates fifteen years later turns out to be that huge hit.
立派な人を尊敬しようとするまる子は、伝記を読みその人の真似をしてみるが、何をやっても中途半端で長続きせず、その度にみんなにバカにされてしまう。いつか歌を作ると思い続け、15年後に出来た曲が、あの大ヒット曲…。