Master Waytt, who lives in seclusion on the earth of the first parallel universe, has always guarded a key to the survival of the seven parallel universes, and has been peaceful for 100,000 years. But now, the Lion King, one of the four guardians of Hades, is leading the underworld warriors to come to Earth through time and space, to come and get this key back. The seemingly peaceful earth is actually brewing a bloody war. On the other hand, Kino and Thales, two ordinary middle school students on Earth, were not aware that the danger was approaching them step by step. They are still chasing after a young girl, Phoebe, whom they meet by chance, when suddenly soldiers from the underworld appear.
