Toya, who lives in a poor tenement house, had a secret. He was the so-called "Osaki Mochi" that was able to hear and see the youkai from an early age, and is therefore possessed by the weasel Osaki called "From that power, he was found in the so-called "Gozen" of the former Hitsuke Tozoku Kai, and solved the unknowable incident that occurred in Edo.