[DeepL Translation - needs review] Introduction to Volume 1: Masayoshi rescues Mr. Richard, a handsome foreigner who is being tangled with by a drunken man. When Masayoshi learns that Mr. Richard is a talented jeweler with clients in Japan and abroad, he asks him to appraise a pink sapphire that has an unexplained secret that no one can tell. When Mr. Richard unravels the sad "mystery" of the gemstone, which his grandmother guarded until her death, what comes back to Masayoshi's mind is .......
