In addition to Yuusha Party wo Tsuihou Sareta Shiromadoushi, S-Rank Boukensha ni Hirowareru earlier, the 10th anniversary project site for Futabasha’s light novel label Monster Label has also announced that a TV anime adaptation of Tobirano’s romance novel series Betrothed to my Sister’s Ex (Zutabro Reijou ha Ane no Moto Konyakusha ni Dekiai Sareru in Japan) is set to premiere in 2025. The novel series has originally run on the novel self-publishing website Shousetsuka ni Narou since October 2019. Its print edition started releasing from the M Novels F imprint since April 2020, and the latest seventh volume was released in May 2024. The manga adaptation illustrated by Chikage Nakagura has been published from the Monster Comics f imprint since January 2021, also releasing seven volumes.The manga’s English edition is available on Pocket Comics with the description:
With unmaintained red hair and shabby clothes, Marie, the baron’s daughter, has been treated like a servant all her life. Count Granado, the country’s richest man, who is said to be a difficult misogynist, falls in love with her at first sight. However, due to a misunderstanding, Count Granado proposes to her sister Anastasia, who looks like a princess, instead of the ragged Marie. A very popular work from “Become a Novelist”! Marie’s Cinderella story that began with a hero’s misunderstanding!
Novel 1st volume cover
Manga 1st volume cover
Monster Label 10th Anniversary Project CM
Sources: Monster Label 10th anniversary project site, Pocket Comics