Nai’s journey in search of Karoku by using a bracelet as a clue has led to his meeting with a boy named Gareki and the beginning of their travel together. Nai searches for someone important to him, with only an abandoned bracelet as a clue. Gareki steals and pick-pockets to get by from day to day. The two meet in a strange mansion where they are set-up, and soon become wanted criminals by military security operatives. When Nai and Gareki find themselves desperate in a hopeless predicament, they encounter none other than the country's most powerful defense organization - Circus!!