The series has famously avoided romantic labeling between Richard and Seigi. Volume 9 continues this but with greater tension. A minor character explicitly asks Seigi, "Is he your lover?" Seigi blushes but says, "He’s my employer. And my… something else. I don’t have a word for it." This is as close as the series comes to acknowledgment. The yellow diamond, given as a gift, becomes a stand-in for a ring—but one that does not fit any traditional category. It is a promise, but of what? Protection? Partnership? The volume leaves the answer in the rough.
Volume 9 of The Case Files of Jeweler Richard is not a crowd-pleaser in the traditional sense. There are fewer clever riddles, less of Richard’s dry wit, and no neat, uplifting resolutions. Instead, it offers something rarer: emotional honesty. It asks hard questions about the limits of friendship, the cruelty of good intentions, and the loneliness of those who see too clearly.
The second case is the volume’s emotional core. A mysterious package arrives at Jewelry Étranger —a raw yellow diamond, uncut and unpolished, accompanied by a letter written in Sinhala. It is addressed not to Richard, but to "The Son of the Sapphire Thief."
Long conversations over tea that define their relationship.
Representing guidance and destiny, the star sapphire reflects Seigi’s role as Richard’s "north star." In Vol. 9, Seigi moves beyond being a mere apprentice; he becomes the emotional anchor that prevents Richard from drifting back into his previous isolation. The Evolution of the "Ally"
The volume includes the usual bonus short story (a prequel featuring Richard’s time in London) and glossy full-color illustrations of the aquamarine ring and the new character, Asaf.