Sword Art Online Unital Ring, Vol. 1 (manga)

This might be a game, but it's not something you play.Orchestrated by genius scientist Akihiko Kayaba, the SAO Incident trapped players in a game they had to beat in order to escape—one where death in the virtual world meant dying in real life…As a survivor of the Incident, Kirito now spends his time playing the new VRMMORPG ALfheim Online with his old friends, Asuna and Alice. But their fun is short—lived, as Kirito soon finds himself thrust into a mysterious new game called Unital Ring. Even worse, all their stats have been reset. In such a brutal environment, will they manage to survive?!