The title has been changed due to the book adaptation! The content differs between the book and web versions. Please wait for the web version updates. "I was the one who really wanted to go? But you see, it just doesn't match. So, please go in my place, you'll surely fit in perfectly." Pushed by her sister Casablanca and her parents, Mimosa, the second daughter of the Norton Viscount family, a shy and introverted 17-year-old, ends up marrying the next Earl's family without a formal meeting, as a substitute. The portrait used for the meeting is from when she was 12, and it clearly shows a... plump child wearing a bow tie on her neck, trying to look serious. The Earl had originally wanted Casablanca, but when the unassuming and shy Mimosa arrives as a substitute for her sickly sister, she is surprisingly welcomed with open arms. Moreover, the next Earl is...?! A love story starting from the newlyweds, featuring a timid and gloomy lady and a reformed next Earl knight! * Also serialized on Kakuyomu. * After the Alpha version ends, it will be rewritten into a long version. Please stay with us. * The Mimosa in this work refers to the plant Mimosa (Mimosa pudica). Any questions or comments regarding this will be deleted. * Thank you for ranking 1st in the quarterly overall rankings! (4/15 - 4/29) * Thank you for ranking 5th in the quarterly overall rankings! (3/15) * Thank you for ranking 1st in the monthly overall rankings! (2/25 - 3/15) * Thank you for ranking 1st in the isekai romance overall rankings! (2/12 noon - 2/14 night) * Please refer to the activity report for the handling of reviews.