The Legend of the Hero Alice's Social Death

I, Alice, an ordinary transmigrator, accidentally became a hero and, without realizing it, pretended to be the Demon King... Now, I'm forced to live as a double agent between humans and demons, constantly fearing exposure. Fine, for the sake of world peace and to return home, I'm shamefully deceiving various cute girls? But What? The cheat system assigned to me is the death of my social reputation...Help!