TV-Series
Description
Twelve-year-old Mayuki Hyūga lives in Kyuto, the city rebuilt from Tokyo's ruins after a devastating earthquake three decades ago. He possesses exceptional problem-solving skills and extrasensory perception, enabling him to solve supernatural "phantom cases" that confound regular police. His background is intentionally obscured, with no formal schooling prior to the series' start. Despite genius-level intellect in most academic subjects, he struggles with physical education.

Mayuki has blond hair, blue eyes, and an innocent, doll-like appearance. He typically wears refined clothing: a cravat, frilled shirt, vest, and three-quarter-length pants. He resides in a Western-style mansion under the care of his butler, Seiran Shinano, and maid, Hatsumi Mieno. Seiran, later revealed as Mayuki's maternal uncle, promised Mayuki's mother, Shara Hyūga (who resides in Switzerland), to protect him.

Mayuki's core ability is "Shinchi," a Magical Eye inherited as head of the Hyūga family. This power lets him visualize hidden truths. When unconsciously accessing it, he declares, "I found the path that leads to the Labyrinth’s exit." He assists police detectives Miyako Tomaru and Inogami Ryūsuke with phantom cases, initially via anonymous tips before meeting them personally.

After enrolling in school, Mayuki befriends classmates including Minori Izumi (who develops romantic feelings), Yae "Yaya" Yatomi (who competes for his affection and suffers pollution-induced allergies), and the Koga twins—calm, precognitive Rakuta and impulsive Kōta. His daily life includes his loyal large white dog, Maru.

Key family revelations emerge: Mayuki's father is Masaki Hyūga (also called Seiju Shinano), the former Hyūga family head. Seiju became embittered after Mayuki's birth displaced him as heir, leading him to seek immortality and orchestrate phantom cases to force Mayuki's Shinchi to awaken. Seiran and his brother Shien are Seiju's siblings, making them Mayuki's uncles. The Shinano clan supports the Hyūga family using "dolls" or "Aya"—human puppets controlled by "doll users." Hatsumi and Sanae Izumi (Minori's sister) are revealed as Seiran's Aya, transforming into warriors Souka and Yūhi when activated.

Mayuki confronts his familial legacy and the moral weight of his power, experiencing guilt when his actions endanger friends. This culminates in a breakdown upon realizing Shinchi's destructive potential. The conflict peaks with Seiju's attempts to harness Mayuki's power, resulting in battles where Seiran and Shien are overpowered. Seiju is ultimately defeated. Mayuki continues navigating his identity and responsibilities. The series concludes with him encountering a mysterious girl who resembles him.