Nazotoki wa Dinner no Ato de

A wealthy woman, Reiko, works as a detective despite her inherited status. She is frustrated by her superior's flawed reasoning, which often hinders investigations. Her butler resigns and is replaced by Kageyama, whose sharp deductive abilities become evident when he solves a difficult case. Following this, Reiko consults Kageyama on challenging mysteries, presenting the details to him, and he provides solutions after dinner. With each case, he also shares insights into broader truths about human behavior that contributed to the crime.