Japanese blog Re:Zaregoto spotted a banner on Amazon.jp that indicates that a sequel to Criminal Girls on PSP is in development.
![CriminalGirls2](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI1NjQiIGhlaWdodD0iNDYiIHZpZXdCb3g9IjAgMCA1NjQgNDYiPjxyZWN0IHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiIHN0eWxlPSJmaWxsOiNjZmQ0ZGI7ZmlsbC1vcGFjaXR5OiAwLjE7Ii8+PC9zdmc+)
NISA has yet to officially announce it at this time, however Amazon Japan lists the game having a release date of November 26 for PS Vita.