Richard Ranasinghe de Vulpian is a brilliant and enigmatic British jewelry appraiser. Seigi Nakata is a young college student. Their worlds are as different as can be, but when a chance encounter leads Seigi to hire Richard to appraise a family heirloom, it sparks a partnership that goes well beyond that one job. Together, the duo investigate jewelry-related cases and solve mysteries, finding the secret messages hidden in the hearts of precious stones–and the hearts of those who possess them. (Source: Seven Seas Entertainment)

Housekishou Richard-shi no Nazo Kantei has been published digitally in English as The Case Files of Jeweler Richard by Seven Seas Entertainment under the Airship imprint since June 30, 2022, and in print since October 11, 2022.