Assassin's Love Quest: Highly Anticipated 'Marriage Toxin' Anime Unleashes in April 2026

The highly anticipated manga sensation, Marriage Toxin (stylized as MARRIAGETOXIN), is officially set to make its electrifying debut as a TV anime in April 2026. Penned by Joumyaku and brought to life through Mizuki Yoda's captivating illustrations, the series has captivated audiences on Shueisha’s Shōnen Jump+ since April 2022, earning a dedicated following for its distinctive fusion of dark action, laugh-out-loud comedy, and heartfelt romance.

Animation powerhouse BONES, celebrated for its stellar productions, is at the helm, promising an adaptation that will vividly translate the manga's dynamic narrative to the screen. The story centers on Hikaru Gero, a scion of the clandestine Poison Clan, a lineage of elite assassins. Despite his perilous profession, Gero's greatest challenge arises not from combat, but from a clan decree: he must marry and secure an heir to spare his sister from a forced childbearing role within their dangerous family.

Thus begins Gero's unlikely quest into the bewildering world of romance and social interaction. To navigate this unfamiliar terrain, he enlists the unconventional assistance of Mei Kinosaki, a charismatic cross-dressing marriage swindler. Their evolving partnership is expected to infuse the series with layers of witty banter, unexpected tender moments, and genuine character growth, all against a backdrop of high-stakes action.

The creative team behind this ambitious project includes Motonobu Hori as director, with Kimiko Ueno handling series composition, and Kohei Tokuoka crafting the distinctive character designs. The atmospheric and action-packed world of Marriage Toxin will be underscored by an original music score composed by Taisei Iwasaki and yuma yamaguchi.

With BONES' reputation for unparalleled animation quality, fans can anticipate a visually spectacular production that flawlessly balances the manga's intense combat sequences with its charming comedic timing and emotional depth. Overseen by the dedicated MARRIAGETOXIN production committee, this anime is poised to be a major highlight for the anime community. Its arrival in April 2026 underscores the continued global enthusiasm for Japanese pop culture, offering both loyal manga enthusiasts and new viewers an immersive experience into a world where deadly assassins seek love and legacy.