Maruo Kaido, a young man with an extraordinary physical strength and a deep fascination with yokai and manga, finds himself drawn into a hidden world where humans and supernatural beings coexist. After a chance encounter with Urara, a yokai princess on the run from her enemies, Maruo becomes entangled in a conflict between yokai factions vying for power. Urara seeks to reclaim her family’s territory and restore her clan’s honor, and Maruo, inspired by his love for manga tropes and his desire to live a life of excitement, decides to assist her.

The narrative unfolds in a modern-day Japan where yokai operate in the shadows, maintaining a delicate balance with the human world. Maruo’s unique ability to withstand immense physical damage and his combat prowess make him a valuable ally, despite his human origins. As he and Urara navigate this dangerous underworld, they face off against powerful yokai adversaries, each with their own motivations and abilities. The story explores themes of loyalty, ambition, and the clash between tradition and modernity, as Maruo’s human perspective often contrasts with the ancient, often brutal customs of the yokai world.

Key characters include Urara, the determined and resourceful yokai princess who seeks to reclaim her birthright; Maruo, whose unwavering enthusiasm and strength drive the duo forward; and various yokai leaders and enforcers who serve as both allies and antagonists. The series blends action, supernatural elements, and humor, with Maruo’s manga-inspired worldview often providing a lighthearted counterpoint to the darker aspects of the yokai conflict. The plot progresses through a series of battles, alliances, and revelations, as Maruo and Urara work to challenge the established order and carve out their own path in this hidden world.