Sunao’s substitute appears when she doesn’t want to attend school. Created from her wish, and this is a secret that no one knows about until she started talking with her classmate, Sanada. Sanada soon senses something unusual and becomes the first one to know her secret. She asks him to only speak with her when her hair is half up. As they started to spend time together, she developed feelings for him, uncertain of her future as a temporary replacement.