One year after the deadly "SAO" incident, peace has returned to the world.
Kirito, the "Black Swordsman" – a.k.a. Kirigaya Kazuto – is contacted by a government official named Kikuoka Seiji, who wants his help to investigate a certain incident:
In a new VRMMORPG called "Gun Gale Online", Players are dying in reality after getting killed in-game – something that obviously shouldn't be happening.
Meanwhile, in "Gun Gale Online", a certain female Player seeks out strong enemies to eliminate.
Her name is Sinon.
What is her true goal...?!!
Bursting with impactful illustrations, "Phantom Bullet" begins!