People are dying mysteriously in real life after getting shot dead in a game.
Kirito logs into "Gun Gale Online" to find the key to uncovering the truth about these incidents – a Player named "Death Gun".
In the game, Kirito meets a certain female Player.
A sniper named Sinon, she is striving to overcome a past trauma by improving her gun skills in GGO in order to defeat strong enemies and win the game.
Kirito, whose avatar appears extremely feminine in GGO, ends up working together with Sinon...?!!
The manga version of "Phantom Bullet" enters its second volume!
A spectacular battle between guns and swords awaits!