Evolution of Changing Girls

The supervisor overlooks all living beings in the starry sky ship and enslaves everything. Barely clothed tribesmen crawled on the earth. The strong men hunted giant beasts, obtained energy cores, and kept them among their tribes, treating them as treasures. They summed up a way of evolution: evolution by becoming a girl! After hundreds of years of development, the evolvers built a huge city in an attempt to resist the enslavement of the supervisors! At this moment, a visitor from another time and space fell into this world with colorful rays of light!