MARRIAGETOXIN

In the shadowy underworld, the Poison Masters of the Five Great Families wield fearsome power. Hikaru Gero, heir to the Gero Family, has lived a life detached from ordinary concepts like love. When his family's brutal succession demands threaten his sister, Hikaru's world collides with that of Mei Kinosaki, a brilliant marriage swindler who becomes his latest target.

To protect his sister and solve the family crisis, Hikaru makes a desperate and impulsive proposal to Mei: help him find a bride. This anime weaves a thrilling narrative of deadly arts, familial duty, and the unexpected complications of a marriage of convenience in a world of poison and deception.