The story takes place in the year 2022, in Japan the first game opens VRMMORPG called SAO! in this game each user creates an avatar and using a NerveGear they enter in real time to play said game, at the end of the day one of the players tries to get out of the game, but ... he could not! they are teleported to the center of the game and the creator of the game explains the situation, they can not leave the game, the exit option was eliminated, if they are disconnected from the game in the real world their brain will receive an electric shock and if they die within the game will not regenerate to continue, you will die both in the game and in real life! the only way to get out alive was to overcome all the floors of the floating castle where they were called Aincrad . By being aware of this and accepting the reality that is living, Kirito (main character of the series) is immersed in this world as a solo player with the intention of overcoming all levels and beat all the heads of each level! Can he do it alone?
Well friends of steemit this is all for this post, I hope and have been to your liking.
Here I leave the anime links of both the first and second season and his film:
1.- First seasona
2.- Second season
3.- Movie