When a fragile peace treaty is threatened, the leaders of the Armed Detective Agency and the Port Mafia strike an unlikely deal—an arranged marriage between their members. Brilliant yet eccentric detective Edogawa Ranpo is reluctantly paired with You, a cunning strategist from the Port Mafia with a reputation for always getting what she wants.

Bound by duty but divided by loyalty, the two must navigate political intrigue, mutual suspicion, and their own clashing personalities. As hidden enemies seek to sabotage the alliance, Ranpo and You are forced to work together—balancing detective work, mafia politics, and the uncomfortable reality of sharing a life with someone from the other side.

Will you two discover common ground, or will the line between love and betrayal become their greatest mystery?