Tokyo has sunk into the ocean! Most of the world was submerged during a land subsidence. Aika Sumeragi is a salvager who works a small company run by a father and daughter duo. Unfortunately the company isn't successful and money is needed desperately. Therefore Aika accepts the dangerous job of acquiring an artifact called Lagu for a hefty sum. The boss' daughter Aida Rion joins Aika on the mission, and the two set off. The two are captured by Rudolf Hagen; an effeminate but over-sexed man who commands a huge battleship manned exclusively by droves of cute girls in mini-skirts and wants Lagu & Aika (and just about every pretty girl) for himself. Alongside Hargen is his obssessive sister Nena, who is jealous of Aika. There is also another salvager named Gusto, who's also after Lagu and who has a crush on Aika. Aika has a special bustier which, when activated, transforms her into a "superwoman" who can take on whole armies by herself.asinine.

If Aika could be described as original, it only would be to a point as it heavily takes from the perverted imaginations of anyone and everyone who has seen a James Bond movie and wondered what it would look like if done in Anime. This was done only to stretch what could have been half an hour of fan service into far too much. It was enjoyable for as long as someone with attention deficit disorder could stand to sit still. The imagery far outweighed everything else only to be brought up behind by the story and finally the sound. The best I can offer is bargin bin pricing and a few hours to kill will be the only real reason to watch what I lovingly describe as James Bond gone Ecchi. Basically, for what it does, it does it exceptionally well. There's no doubting that.