Okitara 20-nengo Nan desu kedo!: Akuyaku Reijou no Sono Ato no Sono Ato

A duchess known for her concern for her people and active governance is poisoned by the heroine of an otome game and falls into a coma. Upon waking, she discovers that twenty years have passed and regains memories from a past life. She learns of the harm the game heroine, Anne Rose, has caused during her absence. Determined to retaliate and correct the damage, she vows to take action against Anne Rose to protect those she serves.