The Original Sword Art Online

Although this is a game, But it's no joke. ——SAO Sword Art Online designer Kayaba Akihiko A huge rock and steel castle floating in the infinite sky. This is all the world can see. After a curious expert spent a whole month measuring it, he discovered that the diameter of the bottom area is about ten kilometers, enough to easily accommodate the entire Setagaya District. Coupled with the hundreds of floors stacked above, its breadth is beyond imagination. The overall archive size is too large to be measured. Within such a space there are several cities, numerous small streets and villages, forests and grasslands, and even lakes. There is only one staircase connecting each floor, and the staircases are located in dangerous maze areas filled with monsters, so it is quite difficult to find and pass the stairs. But if only someone could... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.