Where to Watch Betrothed to My Sister's Ex

Fancy watching "Betrothed to My Sister's Ex" from your couch, bed, or on your commute? Finding a streaming service to buy, rent, download, or stream the animation TV series via subscription can be a huge pain, so we here at Moviefone want to do the work for you.

We've listed a number of streaming and cable services – including rental, purchase, and subscription choices – along with the availability of "Betrothed to My Sister's Ex" on each platform. Now, before we get into the ways and means of how you can watch "Betrothed to My Sister's Ex" right now, here are some details about the MBS show.

Originally premiering July 5th, 2025, "Betrothed to My Sister's Ex" stars Rena Motomura, Daiki Hamano, Minami Tanaka, Ryohei Kimura. The series runs 1 season(s), and has a score of 100 (out of 100) on TMDB, which assembled reviews from 2 top people.

Interested in knowing what the series is about? Here’s the plot: "Marie, the second daughter of a poor baron’s household, is treated like a servant by her parents. Even at Marie’s birthday party, her beautiful elder sister, Anastasia, is the star. Outside, Marie bumps into Count Kyuros Granado, who falls for her at first sight. Yet, due to a misunderstanding, the Count proposes to Anastasia. After a tragic accident, Marie must marry the count instead!"

"Betrothed to My Sister's Ex" is currently available to stream via subscription, rental, or purchase on .