The story centers around a mysterious tall tower built from an (unsteady) stack of building blocks. Every morning, noon, and evening, an old timekeeping man rings the bell in the tower to confirm the time for the local townspeople. However, one day at noon, the tower bell fails to ring — leaving the townspeople confused about when to eat lunch. The fantasy adventure begins when Karl, an inquisitive boy living in the town, decides to go to the tower's plaza to see what is the matter. (Source: ANN)

It is an action comedy about a young man's persistent sexual fantasies. It has 4 distinct art styles: a manga style, a SD style, a realistic style, and a art-graphic pencil style. (Source: technogirls.org) Based on the manga by TAGAMI Yoshihisa (たがみ よしひさ) that serialised in Big Comic Spirits.

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.

DVD bundled with the limited edition of the 10th volume of the manga, previewing the upcoming TV anime and including footage that will not be used in the series.