Sunao’s life hides a big secret. Whenever she falls ill or doesn’t feel like going to school, someone else takes her place. This “second Sunao” was born when the real Sunao prayed from her heart that someone would take her place. To the world, she is just Sunao, but in reality, she is a fairy created only to help the real Sunao.
Everything is going well until she meets a classmate named Sanada. Sanada is the first to realize that this girl is a little different from the real Sunao. The girl tells Sanada to only talk to her when she has her hair “half-up.” Their friendship deepens, and the mysterious girl begins to like Sanada. But now a fear has settled in her heart—as a fake, does she have the right to love anyone? And if she falls in love, what will happen to her?