Nai is the main character in the series as he searches for someone important to him with only a bracelet as a clue to who this person is. Gareki, the other main character, steals and pickpockets to make a living. The two meet in a mansion where they have both been set up and become wanted criminals. They eventually encounter the government’s most powerful defense organization, “Circus”. “Circus” performs task that even the government can’t handle. Talk about being scary. Their group consists of the strongest fighters to defend them. They wear a certain bracelet called a circus I.D to help them fight as well. Nai appears to be between the ages of twelve and fourteen and was living with a man named Karoku. Karoku mysteriously disappeared one day and Nai went out on a mission to find him. The only thing Karoku left was his circus I.D, giving Nai somewhat of a clue on how to find him. Nai is also not human. Where he comes from in the forest, he is a new species of human called “niji”. He has super hearing and noted as being a genius as well. Alongside Gareki, Nai finds himself stuck in a tale of mystery.