After winning the legendary characters "Kite" and "Black Rose" in an event hosted by the creators of the MMORPG "The World," Shugo and his twin sister Rena enter the game. Alongside their new friends Ouka, Mirelle, Hotaru, and Sanjuro, they tackle events and quests. Shortly thereafter, mysterious monsters emerge; dying to these creatures sends players into comas in the real world. Only Shugo and Rena can resolve this crisis, but why are they being targeted, and what secrets does the game conceal?