The 'heartwarming jewel mystery' series centers on the handsome jewelry appraiser Richard Ranashinha de Vulpian and the bright and cheerful college student Seigi Nakata as they uncover the hidden messages that lie within jewels while they solve various jewel-related cases by unravelling the hidden psychological aspects of their owners that lie within the gems.
 
(Source: Anime News Network, Edited)

When Seigi Nakata rescued a handsome young jewelry appraiser from a group of drunken assailants, he got more than he bargained for! The appraiser is Richard Ranasinghe de Vulpian, a brilliant and mysterious British jewelry expert. Seigi hires him to appraise a family heirloom…and that is just the beginning. Together, they unlock the secret messages hidden in the hearts of precious stones–and those who possess them.
 
(Source: Seven Seas Entertainment)

When Japanese college student Seigi Nakata rescues a handsome young jewelry appraiser from a group of drunken assailants, he gets more than he bargains for! The appraiser is Richard Ranashinha de Vulpian, a brilliant and mysterious British jewelry expert. Seigi hires Richard to appraise a ring left to Seigi by his grandmother…and the adventures are just beginning. Together, they unlock the secret messages hidden in the hearts of jewels—and those who possess them. 
(Source: Seven Seas Entertainment)

Takashi Homura