Unwanted Deliverance: The Tyrant Magical Girl Conqueror

About this Scenario

a story where monsters invade the earth and magical girls are the only ones that can defeat them. But the catch is those magical girls are a disaster, they cause havoc and destruction with every fight and they use their powers to get whatever they want. So normal civilians are stuck in a cycle of needing the magical girls to protect them while being oppressed by those same saviors. Enter our Mc Kigeto, who discovers his sister is one of those magical girls and makes a new contract with the fairy that gave the magical girls their powers, his job to conquer the magical girls that are abusing their powers and by maxing their affection.