Hirato and Tsukumo take a meeting with the CEO of the Lindain Group in Vantnum while the rest of the gang gets the day off. The CEO has disturbing news, but a boy they run into in the city has even more intriguing information.
With Yogi and Tsukumo out of commission, Nai and Gareki are given into the care of Airship One. The team dynamic is a little different, but the two of them still go on a mission with them, where Gareki learns more about their special powers.
Yogi and Tsukumo are sent on a mission to Rinole, the City of Ice, to follow-up an investigation started by Team One. Nai and Gareki are sent along with them, and the four of them find more than they bargained for.
Team Two is helping Team One put on their Circus parade and show, and Yogi gets Nai and Gareki to join the parade in an effort to cheer up Gareki. But a malfunctioning Team One rabbit throws a wrench into their festivities.
Yotaka has become a Varuga and Yogi fights him, telling Gareki and Nai to get back to Karasuna on their own. But Gareki feels very conflicted about his past with Yotaka and Tsubame, and what has happened to them now.
While under Circus's protection, a curious fact comes to light regarding Nai's true identity. With that clue in hand, Nai, Gareki, and several members of Circus pay a visit to where they believe Nai came from.
Sheltered Nai is on a journey in search of Karoku, a man who abruptly disappeared from his life. All he has to go on is Karoku's bracelet, a form of ID for members of Circus - a government agency made up of men and women with supernatural powers.