Seven Seas Licenses Betrothed to My Sister's Ex Manga and Light Novel Series

(April 23, 2025) — Seven Seas Entertainment is pleased to announce the license acquisition of the light novel and manga series Betrothed to My Sister's Ex by Tobirano, Mai Murasaki, and Chikage Nakakura. 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 spent her life living under her sister's shadow as the two grew up in an impoverished baron's home. Every nice thing went to Marie's sister, leaving her without even a proper dress! And right when her sister was being married off to a wealthy Earl–tragedy strikes and Marie's sister is killed en route. With the dowry already spent, it's decided that Marie will take her sister's place and become the Earl's betrothed. But, when she gets there, she finds there's been a serious mix-up—the proposal was a total misunderstanding! Can Marie win the heart of the handsome Earl, or is she destined to live a life without a single nice thing?

Betrothed to My Sister's Ex (light novel) Vol. 1 will be released for the first time in the English language in January 2026 for $15.99 USA / $20.99 CAN, in single volume editions. Ebook editions will also be available on digital platforms.

Betrothed to My Sister's Ex (manga) Vol. 1 will be released for the first time in the English language in January 2026 for $13.99 USA / $17.99 CAN, in single volume editions. Ebook editions will also be available on digital platforms.

About Seven Seas Entertainment
Established in 2004, Seven Seas Entertainment is an award-winning publisher that specializes in bringing the best of Japanese manga and light novels to English-language audiences alongside the hottest danmei, webtoons, and other books from around the globe, as well as producing audiobooks, original comics, and youth literature. All of Seven Seas' print book imprints are distributed throughout the world by Penguin Random House Publisher Services. For more information, visit sevenseasentertainment.com