The MARRIAGETOXIN TV anime, initially announced in September 2025, has released its first full trailer along with a new key visual, additional cast members, and confirmation of its premiere in April 2026.
This latest update builds excitement for the upcoming adaptation, produced by Bones Film under the supervision of the renowned studio Bones. The series promises a unique blend of high-stakes action, romance, and comedy, centered on an unlikely partnership between a lethal assassin and a cunning marriage swindler.
The trailer showcases dynamic animation highlighting the protagonists' contrasting worlds: the deadly precision of the poison clan and the deceptive charm of matchmaking schemes. Viewers get glimpses of intense action sequences intertwined with humorous romantic mishaps, setting the tone for the series' distinctive mix of genres.
The newly revealed key visual features Hikaru Gero with his poison needle alongside Mei Kinosaki with a ring box.
The latest cast announcements include:
Anna Nagase as Kyoko Himekawa (Riko Amanai in Jujutsu Kaisen)
Asaki Yuikawa as Shiori Ureshino (Niina Shimazaki in Blue Box)
Hinano Shirahama as Kimie Arashiyama (Sara Haizaki in Hotel Inhumans)
Mariya Ise as Shizuku Ushio (Killua Zoldyck in Hunter x Hunter)
Soma Saito as Genya Naruko (William James Moriarty in Moriarty the Patriot)
Simba Tsuchiya as Pilchi Nakagawa (Tsutomu Goshiki in Haikyu!!)
These talented voice actors bring notable experience from popular series, adding depth to the supporting characters who play crucial roles in Gero's journey toward understanding love and relationships.
Motonobu Hori (Metallic Rouge) directs the MARRIAGETOXIN anime at studio Bones Film, with series composition by Kimiko Ueno (Zenshu), character designs and chief animation direction by Kohei Tokuoka (The Fragrant Flower Blooms With Dignity), and music by Taisei Iwasaki (Belle) and yuma yamaguchi (Link Click).
The production team combines expertise in action-driven storytelling and emotional character development, ensuring the adaptation captures the manga's energetic pace and heartfelt themes. Bones Film, known for high-quality animation in ongoing hits, is poised to deliver visually striking sequences that emphasize both the thrill of assassinations and the awkwardness of romantic pursuits.
What is MARRIAGETOXIN about?
MARRIAGETOXIN is a manga series written by Joumyaku and illustrated by Mizuki Yoda, serialized on Shueisha's Shonen Jump+ platform since April 2022. It has garnered attention for its fresh take on action-romance, exploring themes of family duty, personal freedom, and the complexities of love in a world of professional killers.
The story centers on Hikaru Gero, heir to a powerful poison assassin clan, who has dedicated his life to mastering deadly arts while avoiding emotional attachments. However, when his family pressures his sister into an arranged marriage to continue the bloodline, Gero intervenes to protect her happiness. Determined to find a spouse himself and spare his sister, he seeks help from Mei Kinosaki, a skilled marriage swindler with expertise in manipulation and romance.
VIZ Media describes MARRIAGETOXIN as follows:
As a deadly assassin from the poison clan, Gero swears he’ll never settle down—that is, until the family orders his sister to produce the poison clan’s next heir. Refusing to let his sister abandon her chance at true love with her girlfriend, Gero desperately turns to marriage swindler Mei Kinosaki for relationship advice. Can Kinosaki turn this trained killer into a charming husband-to-be?
This premise sets up a series of comedic and dangerous missions, as Gero navigates dates, rival clans, and his own inexperience in matters of the heart. The manga's popularity stems from its balance of intense battles, witty dialogue, and progressive elements, including positive representation of LGBTQ+ relationships.
With 15 volumes released as of late 2025 and ongoing serialization, the source material provides ample content for the anime adaptation. The April 2026 premiere positions MARRIAGETOXIN as a highly anticipated title in the spring season, potentially appealing to fans of unconventional shonen stories that blend action with character-driven humor.
