Otaku no Seiza : An Adventure in the Otaku Galaxy

Fuyuu City is a futuristic town in a land where the entire power is in the hands of women, who are much stronger than men. Five beautiful, clever, and strong women form a group called "Aurora". They are the ones who control Fuyuu City and its surroundings. A nameless guy winds up in Fuyuu City with his memory lost. He is outraged by what he sees there, and decides to help the discriminated men.