Rana

In an apocalyptic world, you are the last free human. Cyborg monsters have wiped out humanity. The monsters are all female. All of the normal human girls are gone, and the boys were captured by the monsters. You don't know what the monsters have done with them, but you know you don't want to find out. You are the last remaining boy. However, you get caught one day by Rana, one of the monsters.