Yuya Jougasaki. Today is her first time on the scene. A rookie female detective at the local police precinct. Serious at heart, a bit of a fangirl, impulsive and passionate. On the other hand, there's Detective Aki Momohime. The young ace of the First Investigative Division. Beautiful, with undeniable abilities, a self-proclaimed "egocentric" attitude, and a penchant for individual play. Yuya is suddenly selected to partner with Aki, the object of her admiration, to investigate a murder, but...!?