In a Massively Multiplayer Online Role-Playing Game called the World, everything is just fun and games. However that is not the case with Tsukasa. He is unable to log out of the World and, unlike other players, he can feel pain. However, he also gains a Guardian with immense power. Mimiru befriends Tsukasa and is shocked to discover his condition. She and Bear try to help but Tsukasa ends up attracting the attention of the Silver Knights, the moderators of the World. After Tsukasa's Guardian struck down their second-in-command, Silver Knight, and several other players, Subaru, the leader of the Silver Knights, though hesitant at first, calls for the capture of Tsukasa. However, as they go deeper into the mystery surrounding Tsukasa's problem, things become more complicated as the problem sprouts from the very core of the World.
Tsukasa wakes up inside The World, a massive online role-playing game full of magic and monsters, and finds himself unable to log out. With no knowledge of what’s happening in the real world, Tsukasa must discover how he ended up stuck in the game, and what connection he has with the fabled Key of the Twilight—an item that’s rumored to grant ultimate control over the digital realm.
Rena and her twin brother Shugo enter The World, a massive online RPG. Playing as the limited edition characters Kite and Black Rose, the siblings encounter powerful monsters capable of sending players into real world comas. To save themselves—and The World—Shugo and Rena must unlock the secrets of the mysterious twilight bracelet before it’s too late!
In the newest version of the massive online RPG know as “The World,” Haseo and his guild mates search for a legendary item called the Key of the Twilight—but they’re not the only ones looking for it. When a rival guild faces off against Haseo and his teammates, the conflict has deep repercussions both inside and outside the game, and threatens to leave the players forever changed.