Eri is always mollifying people with a fake smile on her face. One day, she turns into a doll with the same grin permanently frozen in place. No one notices, however, that she has transformed into a doll. Soon thereafter, she is discovered on the street by a talent scout, and she becomes a popular singing idol. A large number of people imitate Eri’s appearance, gradually taking on her fake smile over time. In order to change her situation, Eri takes real action for the first time in her life.