After winning the legendary characters "Kite" and "Black Rose" in an event hosted by the designers of the MMORPG "The World," Shugo and his twin sister Rena enter "The World" and accomplish events and missions with their new companions Ouka, Mirelle, Hotaru, and Sanjuro. Soon later, unknown monsters arose, and being killed by these monsters put gamers in a coma in the real world. Only Shugo and Rena are capable of resolving this issue, but why are they being targeted, and what secrets does the game conceal?