Мастера Меча Онлайн: Призрачная пуля

The text describes that despite the incident with "Sword Art Online", virtual reality games were not banned and soon regained popularity. However, when things seemed to have settled, a VRMMO (Virtual Reality Massively Multiplayer Online) game called "Gun Gale Online" presents a new surprise - a mysterious player who can kill someone in reality with a shot in the game. Kazuto learns about this from Seijiro Kikuoka, an employee of the virtual division of the Ministry of Internal Affairs, who asks Kirito, as an experienced inhabitant of virtual worlds, to help him investigate this matter.