Zutaboro Reijou wa Ane no Moto Konyakusha ni Dekiai sareru Anime Reveals More Cast, Staff, and Theme Song Details!
Great news for fans awaiting the TV anime adaptation of **Zutaboro Reijou wa Ane no Moto Konyakusha ni Dekiai sareru**! The official website for the series, also known as **Betrothed to my Sister’s Ex**, recently dropped a bunch of exciting updates. We now have details on additional cast members, more staff joining the production, the theme songs, and even got a look at a second key visual.
The anime is all set to make its debut on July 5 at 1:53 a.m. on MBS, TBS, and CBC channels, with a broadcast on BS-TBS to follow.
Meet the Additional Cast
Here are the newly announced voice actors joining the cast for **Zutaboro Reijou wa Ane no Moto Konyakusha ni Dekiai sareru**:
| Character | Voice Actor |
|---|---|
| Anastasia | Tanaka Minami |
| Ruifon | Kimura Ryouhei |
| Mio | Hikasa Youko |
| Ryuu-Ryuu | Ohara Sayaka |
More Talented Staff Join the Production
The production team is expanding! Here’s a look at the additional staff members working on the anime:
| Role | Staff Member | Studio/Company |
|---|---|---|
| Sub-character Design | Kikuchi Yousuke | |
| Color Design | Terabun Kana | |
| Art Director | Kawasaki Miwa | chiptune |
| Art Design | Fujise Tomoyasu | chiptune |
| Art Design | Matsumoto Hideyuki | |
| Director of Photography | Machida Kei | chiptune |
| 3DCG Director | Isobe Kenji | |
| 3DCG technical director | Kimura Akihiko | |
| Editing | Tan Ayako | Graphinica |
| Sound Director | Kameyama Toshiki | |
| Sound Effects | Kitakata Masami | |
| Music Production | Heart Company | Heart Company |
Theme Song Details Revealed
Get ready for some great music! Singer-songwriter **krage** will be performing the opening theme titled “Gesshoku.” For the ending theme, **Myuk** will be taking the mic to perform the song “Marie.” Both of these theme songs were featured and previewed in the anime’s second promotional video.
Previously Announced Main Production Team
Leading the production at **LandQ Studio** is director **Kitagawa Takayuki**. Handling the series composition and writing the script is **Ihara Kenta**. Character designs are being handled by **Satou Akiko**, and the music for the series is being composed by **Yumemi Kujira**.
The Original Story
The anime is based on the fantasy romance light novel series by **Tobirano**. The story first began its serialization on the Shousetsuka ni Narou website in October 2019. Futabasha later picked up the series for publication under their M Novels F label, starting with the first volume in April 2020. These volumes feature illustrations by **Murasaki Mai**. The eighth volume of the light novel was released on January 10.
Manga Adaptation
Fans can also enjoy a manga adaptation of the series, drawn by **Nakakura Chikage**. The manga started running on Futabasha’s Gaugau Monster website in July 2020. Futabasha published the eighth manga volume on December 25, and the ninth volume is scheduled to go on sale soon, on June 25.
English Release On The Horizon
For international readers, Seven Seas Entertainment has licensed both the original light novel and the manga adaptation for English release. The first volume of the manga is currently scheduled to arrive on January 20, 2026.
Source: Comic Natalie
