Sword Art Online Progressive 8 (light novel)

A RACE AGAINST THE CLOCK! The secret feud between the Nachtoy and the Korloy families, who control the Volupta Grand Casino on the seventh floor, takes an unprecedented turn when Kirito and Asuna intervene. But when Kirito attempts to expose the Korloy family’s misdeeds, he ends up stumbling into a trap. Now he has just two days to unravel a mystery, put an end to an unscrupulous conspiracy, and defeat the floor boss. It’s all leading up to a showdown in the arena where everything’s on the line!