Sword Art Online. Progressive. Volume 4

Almost two months have passed since the players of Sword Art Online found themselves trapped in a deadly game, where the death of a virtual character means death in the real world. Fighting on the front lines, Kirito and Asuna... have reached the Fifth level. In this land of ruins, they engage in a hunt for relics, which brings them valuable items and money.
Returning to the Fourth level for the reward promised to them by the dark elf viscount Yofilis, Kirito suggests taking on some small quests related to the catacombs beneath the city. Asuna agrees, but the thing is that it is in this dungeon that the strongest rapier-wielder meets her most hated enemy, for the catacombs are inhabited by... Will Asuna be able to overcome her fear and participate in the progression of the Fifth level?