Accomplishments of the Duke's daughter

Iris, an otome game addict with no time for romance, gets hit by a truck after getting out of work--but instead of dying, she finds herself in the world of a game she d played just hours earlier. However, she s not reborn as the game s protagonist, the main heartthrob of the harem. Instead, she starts her new life as the antagonist, right at the moment she s being sent to live in a nunnery--for the rest of her life!