The Case Files of Jeweler Richard Novel Volume 7 was written by Nanako Tsujimura with illustrations by Utako Yukihiro.

One month after arriving in the mountain city of Kandy to begin his studies as a jeweler, Seigi receives a strange e-mail from “Jeffrey,” with the subject line “Help Richard.” Within is an itinerary for a luxury cruise…that leaves in three days. What has the beautiful jeweler got himself into now?! And can Seigi come to his rescue yet again?