Operating a store whispered to be the gateway to Hell, the character known as "Jigokudō no Oyaji" sets supernatural events into motion. He initiates this by recounting a story to a trio renowned for their fearsome reputation. Following the tale, he provides them with a magical token. This token grants the trio the ability to locate the restless spirit of a murder victim, marking the start of their supernatural endeavors. The shopkeeper functions as the catalyst for their entry into spirit-related investigations, achieved through distributing this token and sharing critical narrative information. Details regarding his background story, development across official media, or appearances in spin-offs remain undocumented.