(Well shit, no website I had had a summary for this, so here we go)
Our female lead wakes up as the moon light is shining brightly through the windows, Curtis, her knight sitting next to her. Everything seems pretty normal until Curtis calls her name. The name of the Villainess that is. After that ordeal, she checks herself in the mirror, and she is not the saint as she would usual play, but the stuck up Villainess! She tries to sign out, thinking that it's a bug on the game's part, but her heart drops at the moment she notices that this won't be an option. She is trapped and now must survive in this game world inside her new body, and tread an unfamiliar path.