Chisato Shimizu, 25, has lived her life at the mercy of her parents. She longed to be a fish swimming freely in the ocean. One day, she listens to Akari Mouri (24), a free-spirited pianist, play the piano and is truly moved. Chisato enlists Akari's help in her search for "what she really loves. Gradually, Chisato becomes attracted to Akari. However, Chisato has a fiancé, Keiji Narumi (27 years old), who is possessive and plans to dye her in his own color. Keiji senses something is wrong with Chisato and begins to restrict her even more...