Fics like Pink Sapphire, White Sapphire

It's a been a few years since Seigi and Richard exchanged gems in London. They've been working together, happy together. But out of the blue, Richard asks for the white sapphire back, and Seigi can't figure out why. A week later, Richard hands him a box and gives him a job. "Inside this box is a ring. It's very important, Seigi, and I want you to figure out why."

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1. Becoming Something New by Humblebeeother (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime), 宝石商リチャード氏の謎鑑定 - 辻村七子 | The Case Files of Jeweler Richard - Tsujimura Nanako)
2. Just another part of you by Wolfspfote (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))
3. A Kiss Under the Mistletoe by Ririban (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))
4. I Would Give Everything by SocialDegenerate (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))
5. Sweet Senses by Kaurudim (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))
6. Name Changes by Kaurudim (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))
7. A Plain Gray Stone by SilvorMoon (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))
8. In Capable Hands by SilvorMoon (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))
9. A deeper, different kind of love by kenyaki (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))
10. How Is This Not a Midlife Crisis, Seigi!? (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))
11. Matching Your Style by Ririban (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))
12. Sweet Birthday by Ririban (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))
13. Ally of Justice by Ririban (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))
14. A Study in Yearning by shonebrightly (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))
15. beyond love by okiiagarii (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))
16. I'd be Misérable without you by orphan_account (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))
17. The Difficult I'll Do Right Now by furiosity (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))
18. They Say by furiosity (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))
19. Memories of Their First Kiss by Ririban (宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))
20. What I Didn’t Say by Prapo237 (宝石商リチャード氏の謎鑑定 - 辻村七子 | The Case Files of Jeweler Richard - Tsujimura Nanako, 宝石商リチャード氏の謎鑑定 | Housekishou Richard-shi no Nazo Kantei | The Case Files of Jeweler Richard (Anime))