It's the year 2173. A few weeks ago, more precisely, since 26.05.2173, in all major cities of our world there is only one theme on the All-Net (An advanced version of our Internet):

Aestral Worlds online, the first fully functional Float-System using online game.

As part of the promotional campaign of Zestro-Electronics, the developer of the Float-System and Aestral raffled 1000 beta access codes among the 13 million preorders. This caused great longing in almost all of the future players.

One of the winners was Ryouta Kuwakabe, a 16 years old student from ""Seishou Academy for Technical Arts"" in Tokyo who doesn't even know about it.