Long ago, a ferocious monster terrorized the land, until a samurai, wielding the legendary “Beast Spear”, sealed him away. 500 years later, a middle school student named Ushio Aotsuki accidentally uncove...

There has been much conflict between the races of the 'Humas', the 'Gabranth', and the 'Evila'. To combat the 'Evila' race's Demon King, the kingdom summons five high school students from 21st century Japan ...