A frequent panties disappearance case. Were not from laundry of a locker and the absence's house of the Sports gym, and the damage that underwear was seized a woman in a road at night has begun to happen. Meanwhile, a large quantity of underthings were discovered in a certain boy ○ school. The connection with a series of continuation theft cases is doubted, but the Sennyuu investigation will be carried out in strict confidence for the sanctuary called the school. Therefore it was a Schoolgirl investigator, the Aoi Tsukasa which was good at disguise to have been chosen.
