A pair of siblings are living together in the outskirts of society. The brother, Yoshio, has a hurt leg, the sister, Mariko, has an intellectual disability and spends most of her time at home. When Yoshio loses his job he does the unthinkable and sells his sister's body in order to pay for food and rent.
The story of Yoji and Haruka two former high-school classmates who are now are getting married and want to spend the rest of their life together. With the changing seasons their life also changes.
Maya, Mei, and Runa Shijo are detectives who work at the detective office of Tokuko Shijo, their aunt. At the same time, the girls helps with their parents' Chinese restaurant. However, no one knows, they all are descendants of the dragon tribe, and they transform into dragon warriors called Dragonet . Their goal is solving the incident caused by the evil tiger tribe.