This one gets under your skin because the horror is domestic. A junior high girl walks a Tokyo street, steps wrong, and comes out the other side in Taisho-era Japan, where a nine hundred year old onmyoji is still paying off a curse he never chose. Rumiko Takahashi has been writing cursed boys and stubborn girls for forty years, and here she strips out the slapstick and leaves the ache: Mao's immortality reads less like power and more like a sentence, and Nanoka's body knows things her memory refuses to give back. The car crash that took her parents is not backstory, it is the wound the whole mystery keeps pressing on, and the moment she watches herself heal from something that should have ended her is when the show stops being a time slip and starts being a diagnosis. Twenty six episodes is exactly enough rope for a slow burn between two people who are both already dead in some way. Stay for the quiet scenes where nobody explains anything and Mao just looks tired.
Mao has walked Japan for nine centuries, bound by a curse that keeps him trapped in the Taisho period while the world changes around him. As an onmyoji, he exorcises supernatural creatures and investigates the paranormal forces bleeding into human society. His solitary existence shatters when Nanoka, a modern-day junior high student, suddenly materializes in his era after visiting the site of her parents' deaths in the future. Disoriented and grieving, Nanoka finds herself face-to-face with this centuries-old mystic who seems to recognize something in her that she doesn't yet understand in herself. Nanoka becomes Mao's unlikely companion as they uncover the truth behind her impossible arrival. Together they confront ayakashi, malicious spirits, and the curse that binds them both. What begins as mystery deepens into something more complicated: two people separated by time and circumstance, each carrying wounds that may only heal if they can untangle the supernatural forces connecting their fates. The past and present collide as they search for answers neither expected to find.