Yuri Seijin Naoko-san

Japanese Title: 百合星人ナオコサン

English Title: Lesbian Citizen Naoko-san

Plot
A girl named Misuzu rushes home in order to see her elder sister, Naoko. When she arrives there, however, she finds her sister has been replaced by a self-proclaimed yurian named Naoko who seeks to conquer the world by 'yurifying' it.