A high school boy Yukinari has been bullied and abused by girls all his life and has developed gynophobia--a fear of women. In fact, just being around them makes him break out in hives! One day, he is transferred to a world that only females inhabit. There he meets a beautiful and mysterious girl named Miharu who inexplicably doesn’t affect him. He somehow manages to return to his own world, accompanied by Miharu, but shortly after, other girls follow them to his world and his life turns into a big mess!