The highly anticipated TV anime adaptation of Joumyaku and Mizuki Yoda’s popular manga series, Marriage Toxin, is officially slated to premiere in April 2026. Produced by Studio Bones Film, known for its dynamic animation, the series promises to bring the unique blend of action, romantic comedy, and high-stakes drama to screens worldwide.
This announcement, initially revealed in Shueisha’s Weekly Shonen Jump, has been met with excitement from fans eager to see the “Poison Master” assassin Hikaru Gero and the cunning marriage swindler Mei Kinosaki animated.
Esteemed Production Team Assembles at Studio Bones Film
Leading the creative charge for the Marriage Toxin anime is director Motonobu Hori, celebrated for his work on series like Carole & Tuesday and Metallic Rouge. The series composition and scripts will be managed by Kimiko Ueno, who has contributed to titles such as Dungeon Meshi.
Kohei Tokuoka, known for his roles in SK8 the Infinity and The Fragrant Flower Blooms with Dignity, is taking on the crucial responsibilities of character designer and chief animation director, ensuring the distinctive visual style of the manga is faithfully translated to animation. The anime’s score will be composed by a duo: Taisei Iwasaki, recognized for his work on Kekkai Sensen and Belle, and Yuma Yamaguchi, also involved with Metallic Rouge. The animation studio, Bones Film, is a subdivision of the renowned Studio Bones, a powerhouse behind iconic anime like Fullmetal Alchemist and My Hero Academia.
Key Voice Cast Brings Characters to Life
The announcement also confirmed the main voice cast who will embody the series’ central, unlikely duo. Haruki Ishiya, whose credits include Hibike! Euphonium, will voice Hikaru Gero, the skilled yet romantically inept assassin. Joining him is Shion Wakayama, known for her role in Dandadan, as Mei Kinosaki, the astute marriage swindler who becomes Gero’s guide in the world of romance.
The Story of an Assassin’s Quest for Love
Marriage Toxin originates from the Shonen Jump+ digital manga platform, where it has been serialized since April 2022. The story centers on Hikaru Gero, a highly skilled assassin from the ancient Poison Clan. Despite his deadly expertise, Gero is hilariously clueless about romance and has little interest in marriage.
However, his world is upended when his family demands he marry and produce an heir to continue their lineage, threatening to force his beloved sister into the role if he fails. To protect his sister’s pursuit of true love with her girlfriend, Gero embarks on a desperate mission to find a wife. His quest leads him to cross paths with Mei Kinosaki, a master marriage swindler who was initially Gero’s assassination target. In a twist of fate, Gero requests Mei’s assistance in navigating the complexities of dating. This forms the core of the series: an action-packed, romantic comedy where an assassin and a swindler team up for what they deem “the world’s toughest mission for love.”
The manga has been praised for its unique premise, balancing intense action sequences with genuinely funny and heartwarming moments, and for its unique characters.
Anticipation Builds for the Anime Adaptation
The Marriage Toxin manga, written by Joumyaku and illustrated by Mizuki Yoda, has garnered significant acclaim, including a nomination for the Next Manga Award in 2022. Its success on Shonen Jump+ and licensing for English release by Viz Media underscore its global appeal.
With a solid production team and talented voice cast now confirmed, the anime adaptation is poised to become one of the most anticipated releases of 2026. Fans can look forward to seeing the “poison master’s hunt for a bride” unfold with dynamic animation and engaging storytelling when Marriage Toxin premieres in April 2026.
