Sword Art Online: Hollow Realization summary: A manga adaptation of the popular game, Hollow Realization takes place in the VRMMORPG game Sword Art: Origin and sees Kirito and friends traversing the land of Ainground, a rebuild of Aincrad, when they meet a mysterious NPC girl named Premiere who hasn’t been coded into the game. Vowing to protect her, they search to uncover the truth of her null coding while also contending with players who want to erase her existence from the game.