Housekishou Richard-shi no Nazo Kantei

After helping a foreigner being harassed in the street, university student Seigi Nakata discovers that the man is Richard, a jeweler with an extraordinary knowledge of precious stones. Asking him to examine his grandmother's ring uncovers a family history Seigi never knew.

Seigi begins working at Richard's shop in Ginza, where customers bring far more than jewelry for appraisal. Pride, love and painful secrets lie behind their requests. Learning to understand the people connected to each stone also teaches Seigi how easily good intentions can become careless judgments.