The story revolves around a girl called Ika Musume squid, who has proposed conquer humanity as revenge for ocean pollution. Your first goal is to base the beach house called "Lemon", which is owned by the Sisters Aizawa. However, when she breaks the wall of the store by accident, is forced to work as a waitress to pay damages.
The history is directly linked to the emergence of Ika Musume near the Lemon beach. In a monologue, she explains her goal to subject of revenge because of the pollution of the oceans to mankind. As a first step, she puts it, the subjugation of the operator of that bar, which is run by the Sisters Aizawa. But soon it turns out that Ika has not the slightest idea of the human world.
