Bishoujo Mangekyou: Kami ga Tsukuritamouta Shoujo-tachi

It was an era unknown. Long after the prosperity of the human civilization - once the ruler of the Earth - had waned, more time passed still... Reminiscent of the edge of the world, there was a place, and in that place the tower stood tall. In the tower a scientist lived. He was alone. For humanity had abandoned this place, he desired company. Left behind by the civilization no more, it was their...