Saya is a huge fan of Ria, a model and a high school girl. One day, Saya feels something Ria-like from a girl she passed on the street. Mari, whom she met by coincidence, is Rias younger twin sister, but unlike Ria she has demure looks and a restrained atmosphere. Thinking it might get her closer to Ria, Saya tries to become friends with Mari, but she slowly finds herself attracted to the reserved but cute Mari.