As if life couldn't get harder for Mizuto Irido after a terrible middle school relationship, his ex-girlfriend moves in with him because she's now his step-sister. The first animated trailer for the upcoming TV anime adaptation of Kyosuke Kamishiro's My Stepmom's Daughter Is My Ex light novel, also known as Mamahaha no Tsurego ga Moto Kano Datta in Japan, was released today along with the first key visual and the announcement of the lead voice actors and main staff.

Voicing the main male lead Mizuto Irido will be Hiro Shimono, best known as the voice of Zenitsu Agatsuma in Demon Slayer: Kimetsu no Yaiba, while his ex-girlfriend/step-sister Yume Irido will be voiced by Rina Hidaka, who is most known for her work as Milim in That Time I Got Reincarnated as a Slime. 

Directing My Stepmom's Daughter Is My Ex will be Shinsuke Yanagi (Ro-Kyu-Bu! SS), with Deko Akao (Mysterious Girlfriend X) writing the series composition, and Katsuyuki Sato (Higehiro: After Being Rejected, I Shaved and Took in a High School Runaway chief animation director) adapting the character designs for animation. The series will be produced at project No.9 and is scheduled to be released in 2022. J-Novel Club releases the novels into English, describing it as such:

Ah, high school. Is there any better place to start fresh after a horrible middle school relationship? Nope! Not unless your ex ends up at the same school as you and is now your stepsibling. What was supposed to be a sanctuary of peace where I could avoid ever seeing her again has become a living nightmare! Everywhere I look, I see her—in my house, in my school, in my class. There's no escape! She even claims that she’s the older sibling. Like hell she is! But I won't lose to her. After all, I'm the older brother in this new family situation. That’s right, we’re family now. No matter how much we may have thought we loved each other before, we saw one another’s true colors and realized we weren’t meant for each other. That’s why even though we may keep up a buddy-buddy sibling act for the sake of our parents, things will never go back to the way they used to be.

Source: My Stepmom's Daughter Is My Ex on Twitter

---- 

Daryl Harding is a Japan Correspondent for Crunchyroll News. He also runs a YouTube channel about Japan stuff called TheDoctorDazza, tweets at @DoctorDazza, and posts photos of his travels on Instagram.