Tohru Ichidaiji is a professional magician. Years earlier, during Yumi Takeshita's middle school days, he saved her from an oncoming truck, suffering a severe hand injury that left a distinctive scar. Eight years later, Yumi, now a police officer, mistakenly apprehended him during her first assignment, recognizing him solely by this scar. Seeking to make amends, Yumi invited him on a date. During their outing, they encountered the actual pickpocket she had originally pursued.

This event sparked an ongoing collaboration where Yumi frequently enlisted his unique skills as a magician to aid her police work. Their professional partnership gradually evolved into a romantic relationship. The narrative follows their joint efforts tackling various incidents, forging an unconventional crime-solving duo within the precinct's jurisdiction. Tohru's character background centers on his heroic act, the resulting scar, and his subsequent involvement with Yumi's law enforcement career. His development unfolds through their collaborative investigations and the deepening of their personal bond, portrayed consistently across the six-episode OVA series.