New MARRIAGETOXIN Anime Trailer Unveils Ending Theme Song

The MARRIAGETOXIN television anime is officially scheduled to premiere on April 7, 2026.
A recently released trailer for the action romance series confirmed that the ending theme song is titled Shake Na Baby and is performed by AKASAKI.
The opening theme song for the production is Kill or Kiss by Yurina Hirate, which was also showcased in the new footage.
Motonobu Hori is directing the adaptation at studio bones film, following his previous work on Metallic Rouge.
The series composition is handled by Kimiko Ueno, while Kohei Tokuoka provides the character designs and serves as the chief animation director.
Taisei Iwasaki and yuma yamaguchi are responsible for composing the music for the series.
The voice cast features Haruki Ishiya as Hikaru Gero and Shion Wakayama as Mei Kinosaki.
Additional cast members include Anna Nagase as Kyoko Himekawa, Mariya Ise as Shizuku Ushio, and Asaki Yuikawa as Shiori Ureshino.
Soma Saito voices Genya Naruko, Hinano Shirahama voices Kimie Arashiyama, and Simba Tsuchiya voices Piichi Nakagawa.
The roles of Akari Gero and Toshiki Hanamaki are filled by Haruka Shiraishi and Yusen Isamu, respectively.
The story follows Gero, a deadly assassin from a poison clan who seeks relationship advice from a marriage swindler named Mei Kinosaki.
Gero enters this unlikely partnership to find a wife and produce an heir, preventing his sister from being forced to abandon her own romantic life.
The anime is based on the original manga created by Joumyaku and Mizuki Yoda, which is published in English by Viz Media.
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