Kiyotaka Ayanokouji enrolls at the prestigious Tokyo Koudo Ikusei Academy, but is assigned to Class 1-D, where students with behavioral problems are housed. The school awards points equivalent to 100,000 yen per month and allows unusual freedom in classes, masking a more complex system.

After thwarting a hijacking with beautiful, silver-haired detective Siesta, Kimihiko leads a life of globe-trotting and crime-solving—until Siesta dies. A year later, a new case will open old wounds as it threads murder, conspiracy, and his dead partner!