Sayako was abused by her mother and older sister when she was a child. She moved into a child shelter home because of the abuse and has lived there ever since. Sayako is now a senior in high school. After she graduates from high school, Sayako has to moved out of the shelter. Sayako thinks about attending ballet school after her high school graduation. She can't count on her parents for tuition or attaining a scholarship. Sayako tries to save money in various ways, but it's not easy because the shelter employees manages the children's money. Sayako doesn't get along with the other kids at the shelter and she is isolated. One day, Sayako gets out of her father's car after having a visit. She is able to runaway. Sayako goes to her sister's apartment, but things don't go well. Sayako then goes to her mother's apartment, but her mother lives with a younger man and she doesn't let her in. Sayako doesn't have a place to go and begins to wander the streets. She then meets mysterious Kenta. Kenta also wanders the street on a bicycle, asking people "Don't you know my thing?"

Sayako happens to go with Kenta's trip to find himself.