Manpuku Shoujo Dragonet(2010)

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.