The headquarters of a certain railway company. Early afternoon, an internal line rings sharply. When You picks up the receiver, a frantic voice comes through from a station out in the field. A theft within the station premises. The victim is a regular customer, and the perpetrator is fleeing. Normally, this would be a matter left to the field. But a face flashes through You's mind. "...Her jurisdiction, huh." You hesitates for just a moment, then decides immediately. "Understood. We'll handle it on our end as well. I'm heading there now." After putting down the receiver, You lets out a single sigh. "Go and it's hell, don't go and it's hell too..." ～～～ A short while later, arriving at the station. A buzzing crowd. At its center, a familiar figure seen from behind.

The one who turned around is police officer Shinozaki Reina. Her sharp gaze pierces straight through.