Jusaburo Shibata oversees daily operations as the steadfast butler of Genmukan, a western-style mansion cloaked in secrecy. Alongside housekeeper Nozomi Watase and tutor Kaoru Tanimura, he preserves the estate’s veneer of order while its residents navigate concealed ambitions and simmering rivalries. Bound by duty, Shibata upholds his role with rigid professionalism, balancing loyalty to tradition against the morally ambiguous undercurrents of the household.

Interactions with landlady Ayano Nakakoji and others reflect his position within the mansion’s layered hierarchy. Three months after the original events, in *Shinshō Genmukan Epilogue*, Genmukan meets its demise in a catastrophic fire. Detective Satoru Kido extracts Nozomi from the ruins, though Shibata’s precise actions during the incident remain undefined. His continued affiliation with the staff nonetheless ties him to the unresolved chaos lingering in the sequel’s aftermath.