It's the Last Day of the Earth! Love Pheromone!

From far, far beyond the galaxy, a mysterious army suddenly attacks Earth. Will the human race have no choice but to succumb to the legions invading one after another? Finally, evil's hand reaches out to the five Hokke sisters. The world is in a pinch, and Sekiman, along with the world's other heroes (except Love Pheromone) are prepared to defend it. What will be the fate of the Gedou Otome Tai? Will it be a big, super-serious development in the series' plot? (By the way, what about Love Pheromone?)