Sword Art Online II: Debriefing

Kirito enters the firearm-centered virtual world Gun Gale Online to investigate Death Gun, a mysterious player linked to real deaths among people shot inside the game. There he meets Sinon, an elite sniper fighting her own fear of guns, and the two are drawn into the Bullet of Bullets tournament where Death Gun intends to strike again.

The investigation reveals ties to the murderous Laughing Coffin guild from Sword Art Online and a method that connects crimes in the virtual world to accomplices in reality. Kirito and Sinon must survive the tournament long enough to expose the killer while confronting memories neither of them has truly escaped.