Meanwhile, Richard does everything he can to protect Seigi from the demons of gem dealing. He appreciates every bit that Richard is willing to tell him, but respects his privacy. Richard has a checkered past and, even when confronted with pieces of it, Seigi doesn't push for answers.

Their relationship is formed from mutual respect, with each man seeing the other's noble qualities above all else. Once Seigi is hired to be Richard's part-time assistant, they become closer with every jewel they encounter. Seigi Nakata saves the titular Richard Ranashinha de Vulpian from a group of drunks one night, and the two men entertain the idea that their meeting was fate by the end of Episode 1.

Centering on a Japanese college student and a mysterious foreign jeweler, The Case Files of Jeweler Richard is the lightest on this list in terms of its BL content, but the relationship forming at its center is one of the best.