The innocent Money Town is under the tyrannical rule of the vicious gang, the Mukuro Family. That all changes when a young girl name Chirol and her friends decide to become gangsters themselves and claim Mukuro's turf for their own! A heartwarming? Violent? Daily life comedy.

As the eldest son of a rich family as well as a top A student, Natori Mitsuru is acknowledged as a superior existence. However, he is actually a loner with no friends. One day, Mitsuru is placed in a group made up of leftover students for a school function, however, with their personalities being so overly peculiar, will he ever be able to escape his status as a loner?

In a certain town exists a laboratory named "King Lab." Living there are genius scientists with too much time and leisure on their hands. One day the culprit of a series of murders arrives at the laboratory and a strange dark comedy begins.