AN EXCITING KAIJU STORY BLENDED WITH THE YOKAI OF JAPANESE FOLKLORE, PERFECT FOR FANS OF BOTH! After giant kaiju threaten to destroy Japan, the guardian spirits of the nation, known as 'Yokai' appear before the young boy Kei… They tell him he is the descendant of the legendary monster slayer Watanabe no Tsuna, and may be the only person who can stop the catastrophe.