The series is well known for its copious amounts of fan service, specifically the camera angles on panties of the many female characters who populate the show.

Following a catastrophic earthquake twenty years prior, Tokyo, along with most of the world, has sunk into the ocean during a large-scale land subsidence.

However they are captured by Rudolf Hagen, an effeminate but over-sexed man who wants to use the Lagu to transform the world, destroying its inhabitants, and replacing them with an army of young women called the Delmo Corporation who will carry his progeny.

Following the defeat of the Hagens, the Delmo Corporation girls seek other methods to foil Aika in episodic stories.

The Delmo Corps, also referred as the Delmogeny (デルモゲニィ, Derumogenii),[10] is a group of pretty ladies headed by Rudolf Hagen who serve as his private army and to propagate his genetic material once he wipes out humanity from the Earth.

Following Hagen's defeat in the first half of the series, the Delmogeny continue to function with the goals of capturing Aika and studying her special powers.

[8] He described Michikusa as "a waifish goofy ass boy who serves only one purpose: to be on screen and take time away from panty shots.

[3] Todd Douglass Jr. of DVD Talk likened Aika's transformation to that in Cutie Honey and called the series the "epitome of guilty pleasure anime".