Sword Art Online: Project Alicization, Vol. 3 (manga)

A year after Kazuto and Asuna escaped from Aincrad, the deadly setting of Sword ArtOnline, they're still coping with the aftermath as they try to recover from theharrowing experience. Meanwhile, there's a new VRMMO game sweeping the world'sgamers--Gun Gale Online. When a mysterious player who calls himself "Death Gun"claims to be responsible for real-world deaths, Kazuto (aka Kirito) is recruited to enterthe game to investigate, bringing an end to his hard-won peace!