Takara Itosaki's boyfriend of two years, whom she had been thinking of marrying, suddenly dumps her. He states, "I'm not sure if you like me anymore because you don't get jealous." She has liked and cherished her past boyfriends in her own treasured way, but for some reason she is not always depressed when they break up. One day, a beautiful woman visited the real estate agency where she works. After talking with her for a while, she realizes that she is Ema, a classmate of hers, who transferred to another school in the second year of junior high school...