Set in Kunitachi City, Tokyo. Reiko Houshou, a rookie detective at the Kunitachi Police Department, is also the heiress of the globally renowned "Houshou Group." She tackles challenging cases alongside Inspector Kazamatsuri, heir to the "Kazamatsuri Motors" family business, and Kageyama, her sharp-tongued butler and driver. With biting remarks like, "Are your eyes merely decorative, my lady?" Kageyama not only critiques Reiko's lack of deductive skills but also brilliantly solves the mysteries at hand. A sharp-tongued butler meets classic detective fiction in this unique mystery series.