: Returning members of the 13th Division, including new recruits like Alex and Asakura Nagare, provide the backdrop for the agency's internal friction. Gameplay and Content

The game is available in a censored edition on Steam . However, players can download a or patch from official sources like Johren or Shiravune to unlock adult content and additional character routes, such as Ryouko's.

The game is set in the , a sunless city plagued by crime following a catastrophic war. Players step back into the shoes of Ruka Hiryu , a cynical detective assigned to Section 13, a dumping ground for the National Police Agency's (NPA) "troublemakers" known as the Sideliners.