"Who decided that the girl with green glasses is the losing heroine?? ~I'm a plain and gloomy duke's daughter, but actually I'm the kingdom's strongest magician~"

I know it. Green hair, glasses, and a young lady is nothing but a parade of losing heroine elements. On top of that, being good-natured to a fault is practically a perfect hand in mahjong. So it seems I've been reincarnated as Chloe, a dark-haired girl with green hair and glasses—a duke's daughter (11 years old). There's no need for precognition to predict that this duke's daughter will meet a miserable fate. To make a young lady packed with losing heroine attributes happy and to avoid the predictable developments, there's nothing to do but climb to the position of the kingdom's strongest using modern knowledge and the natural talents this young lady possessed! Standing in the way: a prince with nothing but pride despite his incompetence, and a court mage who is literally dead weight. And a ridiculously cute little sister who could turn into a villainous lady character if I'm not careful! Isn't there a bit too many obstacles to a happy ending, Miss? Aiming to stay off the "This Young Lady is Dangerous!" ranking. An otaku college student sets out on a rise-to-power romantic comedy starting from zero chances of happiness.