We've all played an MMORPG game where we are all together playing online. We log on then we log out... Tsukasa on the other hand logged on one day and hasnt been able to log out ever since. Tsukasa cant really remember anything about his offline life and only knows what goes on online. Tsukasa unlike the others can feel pain online and often is hurt. Tsukasas inability to log out has gotten the attention of the GMs (Game Masters) and they try to talk to him but after Tsukasas guardian killed the second in command they have since become his enemy.