Sword Art Online Alternative Gun Gale Online manga volume 1 features story by Keiichi Sigsawa and Reki Kawahara and art by Tadadi Tamori.

Karen Kohiruimaki always felt out of place in the real world. Due to her extreme height, she found it hard to make friends with other girls her age. Everything changes when she's introduced to VR and Gun Gale Online. In GGO, Karen is free to play the cute, chibi avatar of her dreams! Can Karen find friendship in this bullet-ridden MMO...?

Sword Art Online Alternative Gun Gale Online manga volume 2 features story by Keiichi Sigsawa and Reki Kawahara and art by Tadadi Tamori.

Karen is living her best life, getting to play as her cute chibi avatar Llenn in the VR game Gun Gale Online. She becomes fast friends with mysterious woman Pitohui, who invites her to an in-game event called the Squad Jam. But Karen won't be teamed up with her new friend-instead she gets paired with the stern and silent M. Not 10 minutes into the event, they get surrounded by a hail of gunfire! Will they be able to hold their own as a two-man team against squads with actual military training...? Hey, wasn't this supposed to be just a game?!

Sword Art Online Alternative Gun Gale Online manga volume 3 features story by Keiichi Sigsawa and Reki Kawahara and art by Tadadi Tamori.

With only two teams remaining in Squad Jam, Karen (a.k.a. Llenn) and M prepare to move in for their final kill...that is, until a sudden barrage of bullets stop them dead in their tracks! Will the two be able to pinpoint the enemy in time for a counterattack?!

Sword Art Online Alternative Gun Gale Online manga volume 4 features story by Keiichi Sigsawa and Reki Kawahara and art by Tadadi Tamori.

In the real world, college student Karen Kohiruimaki lived an unhappy life, self-conscious about her considerable height. But inside the VR game Gun Gale Online, her avatar is on the shorter side—just the way she likes it—and each new day brings something exciting! One day, she’s invited by her in-game acquaintance Pitohui to join the Squad Jam, a team battle tournament, and after some hesitation, she decides to join, forming a team with M, one of Pito's friends. But when M betrays her, leaving her to fight alone, how will she fare against the final team...?