As an eggfruit, Rokuta, the En Kingdom's kirin, was sent to Japan to safeguard his existence. However, he was forsaken by his caretakers and forced to survive alone in the wilderness. Concurrently, a boy named Koya faced a parallel abandonment in the En Kingdom, nurtured by demonic creatures thereafter. Beyond their shared beginnings, these two youths are entwined by fate. Two decades later, their paths collide, threatening grave repercussions for the En Kingdom.