The one and only battousai

Naruto is just a regular player like any other players in SAO. But one day he entered a mysterios cave that had never appeared there before. So he decide to went in to check out. Suddenly. the ground under him fall apart and he fall to the bottom of the cave. There he met a person that will teach him the lost art of sword. hlegend of the battousai had start from there. Narxlizxsug