Rikuo Nura may seem like a typical middle school student, but his lineage tells a different story. With a quarter of youkai blood, he is destined to lead a powerful youkai clan governed by his grandfather, Nurarihiyon. Despite his initial aversion to his heritage due to the sinister reputation of youkai, Rikuo transforms into a formidable youkai at night, resembling his grandfather in his prime. Embracing his ability to safeguard others, he resolves to unify youkai factions nationwide and build his own legendary 'Night Parade of a Hundred Demons.'