Marriage Toxin Anime Announced
Marriage x Toxin is getting an anime adaptation for this Spring 2026
On December 16, 2025, we got more information on the Marriage x Toxin anime adaptation, including additional cast and staff.
The anime was first announced on September 30, 2025.
Later on October 17, 2025, it was revealed that Marriage x Toxin is due for release on April 7, 2026 and revealed information on its staff and main cast.
Cast:
Hikaru Gero: Haruki Ishiya (Kaoru Namikido from Tougen Anki)
Mei Kinosaki: Shion Wakayama (Momo Ayase from Dandadan)
Kyōko Himekawa: Anna Nagase (Riko Amanai from Jujutsu Kaisen, Harley Quinn from Suicide Squad Isekai, Natsuko Hirose from Zenshu)
Shiori Ureshino: Asaki Yuikawa (Hōjō Tokiyuki from The Elusive Samurai)
Akari Gero: Haruka Shiraishi (Asirpa from Golden Kamuy)
Kimie Arashiyama: Hinano Shirahama (Sara Haizaki from Hotel Inhumans )
Toshiki Hanamaki: Isamu Yūsen (Issei Matsukawa from Haikyu!!)
Shizuku Ushio: Mariya Ise (Killua Zoldyck from Hunter x Hunter 2011, Himeno from Chainsaw Man, Ray from The Promised Neverland, young Satoru Gojo from Jujutsu Kaisen)
Piichi Nakagawa: Shimba Tsuchiya (Tsutomu Goshiki from Haikyu!!)
Genya Naruko: Sōma Saitō (Himura Kenshin from the 2023 Rurouni Kenshin reboot, Hyoma Chigiri from Blue Lock)
Staff:
Director: Motonobu Hori (Carole & Tuesday series director, Berserk: The Golden Age Arc Storyboard)
Series Composition and Script: Kimiko Ueno (Zenshu, Carole and Tuesday, Space Dandy)
Music: Taisei Iwasaki (BELLE and Scarlet) and Yuma Yamaguchi (both on Metallic Rouge)
Character Design and Chief Animation Director: Kōhei Tokuoka (The Fragrant Flower Blooms With Dignity)
Art design: Toshiki Amata (Bleach: Thousand Year Blood War)
Sound Director: Haru Yamada (Made in Abyss)
CGI Director: Taiki Nagashima (D4DJ All Mix as CG animation)
Director of Photography: Gō Kanbayashi (Soul Eater, Bungo Stray Dogs, part of My Hero Academia’s Photography team)
Color design: Hiroko Umezaki (Noragami, Sentenced to be a Hero, Uzumaki)
Costume Design: Kotono (Key animation for Takopi’s Original Sin and One Piece Opening 27)
Editing: Kumiko Sakamoto (Dr. Stone, My Hero Academia, Takopi’s Original Sin)
Prop Design: Ayumi Nagaki and Ryō Hirata
Sound Effects: Tomokazu Mii
Sub-Character Design: Yurika Sako
About MarriagexToxin
This series is written by Joumyaku and illustrated by Mizuki Yoda for Shueisha’s Shōnen Jump+ app on April 20, 2022 and has since accumulated 16 volumes, with Volume 17 coming on April 3, 2026 that is likely to cover Chapters 147 to 155.
This story is about Hikaru Geto, a man from the Poison Clan of professional assassins, who wants to save his younger sister Akari from being forced to get married and bear a child, and partners with one of his assassination targets, the cross-dressing marriage swindler Mei Kinosaki, to teach him how to appeal to women to find the right partner for himself.
Source: Twitter
TV Anime “MARRIAGETOXIN” by Studio Bones Film is scheduled for APRIL 2026 broadcasting. pic.twitter.com/ZIlu7fIBE5
— Sugoi LITE (@SugoiLITE) October 17, 2025
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