Hoshino Ki awakens in the dangerous universe of Detective Conan, only to discover he is not the protagonist, but a disposable peripheral member of the sinister Black Organization. With a criminal past and a target on his back, his survival seems impossible in a world where murder is commonplace and the protagonist is a walking death god. Just as despair sets in, the 'Improper Simulation System' activates, offering him a chance to rewrite his fate.

By experiencing alternate life paths in simulated realities, Hoshino can extract rewards, skills, and attributes to strengthen his real-world existence. Choosing to focus on academics first to sharpen his mind, he quickly rises to the top of his class, catching the attention of those around him. However, as his simulated choices begin to ripple into reality, the rigid personalities of the world's female characters start to fracture and collapse under the weight of his altered destiny.

Now, Hoshino must navigate deadly conspiracies, solve intricate mysteries, and manage the chaotic affections of heroines whose scripts have been thoroughly broken, all while evading the gaze of the Organization and the shrinking detective.