Forming a Magical Girl, I Turned Out to Be a Villain

I don't know how many years after mankind became extinct, a young man woke up from the ruins and walked through the world of a new civilization with broken memories, only to find... "Let me go, why are there so many beast-eared girls? And Furui? Hey, your uncle! Where did this come from? Is this still in China?" Before he could even think about whether these people were human beings. When he saw the colorful magical girls flying over the horizon, the giant giant of light in the distance, and a few monsters riding motorcycles, they suddenly turned into Kamen Riders. Now, he didn't need to think about this kind of problem, especially when the system's voice sounded in his head. "Build your own Mahou Shao Bar!" Who? I? "Oh, I have no choice. It seems that I am destined to be the partner of justice." "Collect negative energy, progress: 0/114514" "..." "Hahahahaha, magical girls who claim to be righteous! You are all so unqualified!!" (Suspected to be in a wonderful mental state) (There is no female protagonist, but there is growth. The micro system only promotes the plot, and the male protagonist grows slowly. If you like the technology book and the mystery book, who doesn't like the beast-eared girl, the angel girl and the devil girl, hahaha, all of them will go into my pocket.) (Of course, there is no harem. If there is, it is purely the same.)