Richard Ranashinha de Vulpian, a young and handsome British jewelry appraiser with a great understanding of mineralogy, has a tiny business in Japan. Seigi Nakata, a pious college student, defends him from drunks who were taunting him because of his excellent looks one fateful night. Seigi employs Richard to assess a pink sapphire ring left behind by his deceased grandmother after learning of his identity. Seigi quickly establishes himself as a reliable part-time employee at Richard's store. The two work together to fulfill numerous jewel-related requirements from a wide range of clientele from various backgrounds. They gradually reveal the secret intentions and sentiments concealed inside the gems in order to comprehend and connect with the small tales behind each item of jewelry.