The Case Files of Jeweler Richard Novel Volume 11 was written by Nanako Tsujimura with illustrations by Utako Yukihiro.

An episode in the life of Shoko Tanimoto and her students in the science club at Okayama Junior High School. The saga of how Vincent sold Richard out to Jeffrey during his tenure as shop assistant in Hong Kong. Dispatches from Seigi, Richard, and Haruyoshi's everyday life, the tale of Richard and Jeffrey's stint at a Swiss boarding school, and a drama-filled date with destiny seen through Jeffrey's eyes-find all these and more in this sparkling collection of short stories about the Jeweler Richard cast!