Betrothed to My Sister's Ex (Light Novel) Vol. 1

Author/Contributor(s):	Tobirano; Murasaki, Mai
Publisher:	Airship
Date:	1/20/2026
Binding:	Paperback
Condition:	NEW

The light novel that inspired the manga—also from Seven Seas. A woman who’s lived her life in the shadow of her sister is suddenly taking her place after a tragic accident! But her life is about to get way more complicated. A sweet romance about a poor baron’s daughter and an eloquent Earl!

Marie has always been an afterthought. Her parents treat her like a servant, and her flawless older sister, Anastasia, is the family's shining star. Even at Marie’s own birthday party, all eyes are on Anastasia—so much so that no one notices when Marie sneaks away.
But in the quiet of the evening, she has a chance encounter with a captivating man with striking green eyes: Count Kyuros. Their brief meeting feels like a dream… until reality comes crashing back. Soon after, a marriage proposal arrives from the count—for Anastasia, of course.
Except… something doesn’t add up. The gown that arrives with the proposal? It’s clearly made for Marie. Could there be a mistake? Or is this the start of an unexpected love story?