Hikaru and Mei's unlikely partnership faces its greatest test yet. Having faked their marriage to escape the Gero Family's brutal succession demands, the poison heir and the cunning swindler must now navigate the dangerous politics of the underworld's most powerful clans. Their arrangement was supposed to be temporary, but the deeper they're pulled into schemes involving rival Poison Masters, the harder it becomes to distinguish between their act and something real. With assassins closing in and family loyalties fracturing, Hikaru discovers that protecting those he loves means confronting the toxic legacy he was born into. Mei, meanwhile, finds herself caught between her con artist survival instincts and genuine feelings she never planned to have. The second season ramps up the stakes: every poison has an antidote, but some toxins run too deep to cure. Action and dark humor collide as this chaotic couple races against time, their marriage certificate now their only shield against enemies on all sides.