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.