Sword Art Online Re:Aincrad, Vol. 4 (manga)

THIS MIGHT BE A GAME, BUT IT’S NOT SOMETHING YOU PLAY.Having sworn to help Silica on her quest to obtain the revival item she needs to bring her beloved Pina back to life, Kirito accompanies her to the forty-seventh floor. There, the two team up to defeat a group of plant monsters to obtain their prize, but Kirito’s work is only getting started. He returns to town—a so-called safe zone where mobs can’t spawn and weapons are deactivated—to find that there’s been a murder! Will he and Asuna be able to uncover the truth behind this mysterious killing and put a stop to the one behind it…?