ソードアート・オンライン プログレッシブ7 (電撃文庫)

LUCK BE A LADY TONIGHT! The seventh floor of Aincrada massive casino where over half the games beta testers dropped out before launch. Kirito was among the many who lost everything in its Battle Arena back then. When an informant named Argo the Rat entices Kirito and Asuna with knowledge that could aid in their investigation, the pair soon plunge into the casinos dark underbelly once more. Meanwhile, the Elf War quest also reaches a sudden turning point when a flurry of crises rock the dark elves home!