While in search of his precious friend, a young boy named Nai falls captive to a beautiful woman, whose looks are matched only by her taste for human flesh. Meanwhile Gareki, a clever thief, is in the midst of robbing her luxurious home. After causing a distraction, Gareki agrees to help Nai escape, but they are discovered upon the woman's return. As she transforms into a ghoulish monster, the boys flee. On the run, Nai and Gareki are found by "Circus," a government defense agency that deals with criminal activity too difficult for the police to handle and protects civilians from "varuga"—terrible monsters that devour humans for sustenance. In the hope that it will lead Nai to his missing friend, he and Gareki decide to join Circus. On their perilous journey, they face dangerous varuga and begin to uncover the secrets behind a shadowy organization known as Kafka. [Written by MAL Rewrite]

A two-episode special. They are designated as Episodes 13 and 14, and the first episode is a direct sequel to the previous series while the second episode is about the trans-sex of Natsuru.

During the dawn of the 21st century, the United Nations Kurobe Research Institute was established in Japan to investigate an ancient artifact, which was discovered during the construction of the Kurobe Dam. Scientists from around the world have gathered in the facility to study the object, while their children enjoy their everyday lives attending Mt. Tate International Senior High School. Yukina Shirahane, a reserved high school girl, is the daughter of the facility's head scientist. While visiting her mother at the facility, Yukina manages to solve part of the artifact's puzzle. To her surprise, what appears before her is Kennosuke Tokisada Ouma, a young samurai from the Sengoku era. As a threat approaches from outer space, Yukina, along with Kennosuke, finds herself defending Earth against the invading forces. Along the way, she discovers the mystery behind Kennosuke and the reason he is determined to protect her. [Written by MAL Rewrite]

Waking up transformed into a beautiful girl might be the stuff of some guys' fantasies, but when the suddenly effeminatized Natsuru is informed by a stuffed tiger that he's now a Kampfer, a mystical fighter who has to fight other Kampfers in female form, his life becomes a living nightmare! Putting aside the obvious "plumbing" issues, Natsuru's best childhood friend turns out to swing the other way and SHE has a crush on his new female body. Not complex enough? Natsuru's school has separate sections for boys and girls, so he and she are now double enrolled. The rumor-mill has it that he's dating herself. And there are other Kampfers attending the school who want to take her out, and he's not sure which ones mean "on a date" and which ones mean "permanently." Oh, and did we mention that some Kampfers use swords and guns?! Hormones, fists, and other body parts will fly as the daring, new gender-bender defender must become a contender or die! (Source: Sentai Filmworks)