Tokio and Calen arrive to Greenland in 2016 and meet a very musculuar old man with a white beard and and red suit named Rudolph and his reindeer. For a moment, they thought that the True History that Santa was a macho guy, but then starts pulling the sleigh himself. However, Rudolph ends up passing out from a fever. Tokio and Calen take over delivering presents for him. Apparently Bimajo has some unfinished business with Santa and was waiting for this chance, but...

Yogi going berserk sends the bad guys running, but when Nai senses that something is wrong with him, Tsukumo turns back alone, only to run into trouble herself.

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.

With Yotaka gone, Gareki and Tsubame are left to pick up the pieces and make sense of what has happened.

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.

After their trip to Rainbow Forest, Gareki asks to drop by Karasuna, where they run into an old acquaintance of his. From this enounter, Nai and Yogi learn more about Gareki's past.

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.

Now that Nai knows Karoku's bracelet has something to do with Circus, he goes in search of answers, but he finds that his earlier brush with trouble is far from over.

As Nai and Gareki make their way towards the mysterious rainbow to see if Karoku is there, the rest of Circus work to wrap up what they can of the raid on the Kafka facility.

Nai is determined to go to the Misty Mansion, a Kafka facility, in order to rescue Karoku. And Circus decides to use this as an excuse to raid the facility.

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.

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.

A mysterious madman from Eu’s past terrorizes her new friends. Will the necromancer give in to his demands, or will she stubbornly watch Ayumu and the others meet their untimely ends?

Yuki must learn to like her new husband, Haruna can’t decide whether she wants to kiss - or kill - Ayumu, and the Necromancer disappears while no one is looking!

Ayumu’s exams are interrupted by a rampaging demon-horse and the arrival of a killer-soup wielding vampire ninja! If the poor boy can survive his latest adventure, he may find a mate for life!

Eu, the most powerful necromancer in existence, slips into a pretty pink dress and picks up the most darling little chainsaw as she prepares to go all magical girl on a pesky demon with a plethora of lives!