When Filia, the daughter of a duke, met her brother-in-law Luca when she was 10 years old, she remembered that she was the villain of an otome game. 11 years left until the game starts. Let's avoid the death route...! She tried with great enthusiasm, but all failed. As the game states, Filia is a fiancée candidate for the crown prince, and is disliked by her brother-in-law, Luca. The heroine also appears, and Filia is on the brink. She tries to avoid her ruin flag by marrying a mob knight, but Luca says ``I can't let you go''!?